Online English Vocabulary Flashcards for Time and Chronology Words

aeon (noun) /ˈiːən/
Definition: A period of time that is so long that it is considered to be immeasurable or infinite.
Example Sentence: "The universe has existed for an aeon, constantly evolving and expanding."
Synonyms: age; cycle; duration; epoch; era; eternity
Opposite Meaning: instant

afterward (adverb) /ˈæf tər wərd/
Definition: To indicate that something occurs or happens subsequent to another event or action.
Example Sentence: "The storm passed, and afterward, the sun emerged, casting a warm glow over the landscape."
Synonyms: consequently; following; henceforth; later; next; post
Opposite Meaning: previously

annual (adjective) /ˈæn yu əl/
Definition: An event, publication, or report that occurs, is published, or is produced once every year.
Example Sentence: "The annual tradition of decorating the Christmas tree brought joy to the family."
Synonyms: anniversary; annualized; annum; cyclical; periodical; yearbook
Opposite Meaning: irregular

asynchronous (adjective) /eɪˈsɪŋkrənəs/
Definition: Not happening or progressing at the same time as something else.
Example Sentence: "The asynchronous class format allowed students to work at their own pace."
Synonyms: desynchronized; disconnected; independent; irregular; nonsynchronous; shifted
Opposite Meaning: simultaneous

belatedly (adverb) /bɪˈleɪtɪdli/
Definition: Done or happening later than it should have, or later than was expected.
Example Sentence: "He belatedly realized that he had misunderstood the instructions."
Synonyms: afterward; behindhand; dilatorily; eventually; laggardly; lately
Opposite Meaning: promptly

chronological (adjective) /ˌkrɒnəˈlɒdʒɪkl/
Definition: Arranged in the order in which events occur in time.
Example Sentence: "The anthology was arranged in chronological order."
Synonyms: consecutive; dated; historical; linear; ordered; progressive
Opposite Meaning: random

coeval (adjective) /koʊˈi vəl/
Definition: Of the same age or having the same period of origin, often implying coexistence during the same historical or chronological era.
Example Sentence: "Isaac Newton and Gottfried Leibniz are considered coeval pioneers in calculus."
Synonyms: coetaneous; coexistent; coincident; concomitant; concurrent; contemporaneous
Opposite Meaning: different-aged

concurrent (adjective) /kənˈkʌrənt/
Definition: Pertaining to events, actions, or situations that happen simultaneously or at the same time.
Example Sentence: "The concurrent rise in prices and interest rates made it difficult for homebuyers."
Synonyms: coexisting; coincident; coinciding; concerted; concomitant; confluent
Opposite Meaning: successive

consecutive (adjective) /kənsekjʊtɪv/
Definition: Occurring one after another in an uninterrupted and chronological order.
Example Sentence: "The company experienced four consecutive quarters of record-breaking profits."
Synonyms: constant; continual; continuous; following; ongoing; running
Opposite Meaning: nonsequential

continuity (noun) /ˌkɑntəˈnuəti/
Definition: The unbroken and consistent existence or operation of something over a period of time.
Example Sentence: "The artist's paintings showed a sense of continuity in style and theme."
Synonyms: coherence; consistency; constancy; duration; endurance; flow
Opposite Meaning: interruption

cycle (noun) /ˈsaɪ kəl/
Definition: A recurring sequence or pattern of events or actions that repeats itself over time.
Example Sentence: "The water cycle is responsible for the continuous circulation of water on Earth."
Synonyms: circle; circuit; loop; period; pulse; recurrence
Opposite Meaning: randomness

dawn (noun) /dɔn/
Definition: The earliest part of the day, specifically the time when the sun begins to rise and light gradually replaces darkness.
Example Sentence: "The first rays of dawn peeked through the curtains, gently waking her from her sleep."
Synonyms: aurora; awakening; break; cockcrow; dawning; daybreak
Opposite Meaning: dusk

delay (noun) /dɪˈleɪ/
Definition: A period of time during which an event, action, or process is postponed, slowed down, or prolonged.
Example Sentence: "The flight delay resulted in several passengers missing their connecting flights."
Synonyms: bottleneck; deferment; hindrance; holdup; interruption; lag
Opposite Meaning: promptness

duration (noun) /dʊˈreɪ ʃən/
Definition: The length or period of time that something lasts or continues.
Example Sentence: "The course's duration was three months, allowing for in-depth learning and practice."
Synonyms: extent; interval; length; period; run; span
Opposite Meaning: brevity

elapse (verb) /ɪˈlæps/
Definition: To pass, or passing of time.
Example Sentence: "Time seemed to elapse quickly as we enjoyed our vacation."
Synonyms: advance; flow; lapse; move; pass; proceed
Opposite Meaning: freeze

ensuing (adjective) /ɛnˈsu ɪŋ/
Definition: Following or occurring as a result of something else, typically in a chronological or logical sequence.
Example Sentence: "He made an offensive comment, and the ensuing backlash from the public was swift."
Synonyms: after; consequent; following; forthcoming; later; next
Opposite Meaning: preceding

ephemeral (adjective) /ɪˈfɛm(ə)rəl/
Definition: Having a very brief and transitory existence, emphasizing a fleeting and impermanent nature.
Example Sentence: "The ephemeral existence of the mayfly is one of the shortest in the animal kingdom."
Synonyms: evanescent; fleeting; fugacious; impermanent; momentary; passing
Opposite Meaning: permanent

era (noun) /ˈɪər ə/
Definition: A distinct period of time characterized by specific events, developments, or cultural traits.
Example Sentence: "The Renaissance era is known for its remarkable advancements in art, science, and literature."
Synonyms: age; cycle; epoch; epochal; generation; period
Opposite Meaning: moment

eternal (adjective) /ɪˈtəːnl/
Definition: Without end, everlasting, or existing outside the constraints of time.
Example Sentence: "The concept of karma suggests that our actions have eternal consequences."
Synonyms: deathless; endless; everlasting; permanent; perpetual; unceasing
Opposite Meaning: transient

eternity (noun) /ɪˈtɜr nɪ ti/
Definition: A concept or state that represents endless or infinite duration, transcending the constraints of time and space.
Example Sentence: "The beauty of the starry night sky made them feel connected to the vastness of eternity."
Synonyms: ceaselessness; duration; endlessness; everlastingness; forever; immortality
Opposite Meaning: moment

evanescent (adjective) /ˌɛv əˈnɛs ənt/
Definition: Fleeting and transient, existing only briefly before disappearing or fading away.
Example Sentence: "The snowflakes were evanescent, melting on contact with the warm ground."
Synonyms: brief; disappearing; impermanent; momentary; passing; temporary
Opposite Meaning: permanent

eventually (adverb) /ɪˈvɛn tʃu ə li/
Definition: Emphasizing the idea of something happening or being achieved after a period of time, often involving a series of events or actions.
Example Sentence: "After hours of studying, she eventually understood the complex math problem."
Synonyms: after; conclusively; ending; finally; lastly; later
Opposite Meaning: immediately

expire (verb) /ɪkˈspaɪər/
Definition: To come to the end of a specific period of time, validity, or duration.
Example Sentence: "The lease on the apartment will expire in three weeks."
Synonyms: cease; close; conclude; die; elapse; end
Opposite Meaning: commence

fleeting (adjective) /ˈfliːtɪŋ/
Definition: Momentary, passing by quickly, or lasting for only a short amount of time.
Example Sentence: "She caught only a fleeting glimpse of the intruder."
Synonyms: brief; cursory; ephemeral; evanescent; impermanent; momentary
Opposite Meaning: permanent

fugacious (adjective) /fyuˈgeɪ ʃəs/
Definition: Fleeting, transient, or short-lived.
Example Sentence: "The joy she felt was fugacious, slipping away as quickly as it had appeared."
Synonyms: brief; ephemeral; evanescent; fleeting; impermanent; momentary
Opposite Meaning: lasting

hence (adverb) /hɛns/
Definition: Used to indicate a consequence or a result that follows logically from a previous statement or situation.
Example Sentence: "The chef ran out of fresh ingredients; hence, he had to improvise with what was available."
Synonyms: accordingly; consequently; ergo; then; thence; therefore
Opposite Meaning: previously

henceforth (adverb) /ˈhɛnsˈfɔrθ/
Definition: Referring to a point in time from which a particular action, situation, or rule will be applied or in effect.
Example Sentence: "Starting from today, henceforth, I will prioritize my health and well-being."
Synonyms: afterwards; following; forthwith; forward; hereafter; hereon
Opposite Meaning: previously

impermanent (adjective) /ɪmˈpɜr mə nənt/
Definition: Temporary, transitory, or not lasting indefinitely.
Example Sentence: "The beauty of a sunset is fleeting and impermanent, reminding us to cherish the moment."
Synonyms: changing; ephemeral; evanescent; fleeting; fugitive; momentary
Opposite Meaning: permanent

indefinitely (adverb) /ɪnˌdɛf(ɪ)nɪtli/
Definition: Lacking a specific or predetermined limit in terms of time, duration, or extent.
Example Sentence: "The company decided to put the project on hold indefinitely."
Synonyms: continuously; endlessly; eternal; forever; ongoing; permanent
Opposite Meaning: temporarily

initial (adjective) /ɪˈnɪʃ əl/
Definition: Occurring at the beginning, introductory stage, or first phase of a process, event, or situation.
Example Sentence: "The initial draft of the manuscript underwent several revisions before reaching its final form."
Synonyms: beginning; early; embryonic; first; foundational; inaugural
Opposite Meaning: final

initially (adverb) /ɪˈnɪʃ ə li/
Definition: Referring to the starting point or the earliest stage of a process, event, or situation.
Example Sentence: "She was initially hesitant to join the club, but eventually became an active member."
Synonyms: beginning; first; firstly; foremost; formerly; originally
Opposite Meaning: finally

inopportune (adjective) /ɪnˌɒp ərˈtun/
Definition: Occurring or happening at an inconvenient, inappropriate, or unfavorable time.
Example Sentence: "The printer ran out of ink at the most inopportune time, just as we were printing important documents."
Synonyms: awkward; disadvantageous; improper; inappropriate; inconvenient; mistimed
Opposite Meaning: timely

interim (adjective) /ˈɪntərəm/
Definition: Temporary or intended to be used only for a short period of time.
Example Sentence: "We have appointed an interim manager while we search for a permanent replacement."
Synonyms: acting; caretaker; improvised; makeshift; provisional; stopgap
Opposite Meaning: permanent

intermittent (adjective) /ˌɪntəˈmɪt(ə)nt/
Definition: Occurring at irregular intervals, pausing or ceasing temporarily before resuming.
Example Sentence: "The intermittent rain showers kept us from going outside."
Synonyms: alternating; irregular; occasional; periodic; recurrent; recurring
Opposite Meaning: constant

interval (noun) /ˈɪn tər vəl/
Definition: A defined period of time or space between two events, actions, or points.
Example Sentence: "The train arrives at regular intervals throughout the day."
Synonyms: break; distance; duration; gap; intermission; lapse
Opposite Meaning: continuity

latterly (adverb) /ˈlæt ər li/
Definition: Recently, or closer to the present time compared to a previously mentioned time.
Example Sentence: "He has become more health-conscious latterly, adopting a nutritious diet and exercise routine."
Synonyms: anew; freshly; lastly; lately; latter; newly
Opposite Meaning: formerly

linger (verb) /lɪŋgəʳ/
Definition: To stay or remain in a place or situation for an extended period, often beyond what is expected or necessary.
Example Sentence: "The memory of her childhood home would always linger in her mind."
Synonyms: dawdle; delay; endure; hesitate; hover; loiter
Opposite Meaning: depart

millennium (noun) /mɪˈlɛnɪəm/
Definition: A span of one thousand years, often used to denote a significant and symbolic period in history or the future.
Example Sentence: "The year 2000 marked the beginning of a new millennium."
Synonyms: aeon; age; century; cycle; date; duration
Opposite Meaning: instant

momentary (adjective) /ˈmoʊ mənˌtɛr i/
Definition: Lastsing for a very short period of time or occurring in an instant.
Example Sentence: "He had a momentary lapse in judgment and said something he instantly regretted."
Synonyms: brief; ephemeral; evanescent; fleeting; instantaneous; passing
Opposite Meaning: permanent

nanosecond (noun) /ˈnanə(ʊ)ˌsɛknd/
Definition: A unit of time measurement that represents one billionth of a second.
Example Sentence: "The nanosecond precision of the atomic clock is essential for accurate timekeeping."
Synonyms: attosecond; blink; femtosecond; instant; microsecond; moment
Opposite Meaning: eternity

noon (noun) /nun/
Definition: The specific time of day when the sun is at its highest point in the sky.
Example Sentence: "The clock struck noon, and the town came alive with the sound of bells."
Synonyms: apex; lunchtime; meridian; midday; midriff; noontide
Opposite Meaning: midnight

perennial (adjective) /pəˈrɛnɪəl/
Definition: Persisting or enduring through all seasons or over many years.
Example Sentence: "The daffodil is a popular perennial flower that blooms in the spring."
Synonyms: constant; continuing; enduring; lasting; permanent; perpetual
Opposite Meaning: temporary

perpetual (adjective) /pəˈpɛtʃʊəl/
Definition: Continuous, ongoing, or never-ending.
Example Sentence: "The perpetual gloominess of the weather made it difficult to enjoy the outdoors."
Synonyms: continual; continuing; endless; eternal; everlasting; infinite
Opposite Meaning: temporary

perpetuity (noun) /pəːpɪˈtjʃuːɪti/
Definition: The state of being eternal, everlasting, or continuing indefinitely into the future without interruption.
Example Sentence: "The artwork was donated to the museum in perpetuity for public display."
Synonyms: constancy; endlessness; eternity; everlasting; forever; infinity
Opposite Meaning: temporary

postpone (verb) /poʊstˈpoʊn/
Definition: To delay or reschedule an event, activity, or task to a later time or date.
Example Sentence: "He decided to postpone his vacation until he finished his project."
Synonyms: adjourn; defer; delay; prolong; protract; reprieve
Opposite Meaning: advance

postponement (noun) /poʊstˈpoʊn mənt/
Definition: The act of delaying or rescheduling an event, activity, or obligation to a later time or date.
Example Sentence: "The postponement of the concert disappointed many fans who had been eagerly anticipating the event."
Synonyms: adjournment; deferment; deferral; delay; extension; hiatus
Opposite Meaning: advancement

precede (verb) /prɪˈsid/
Definition: To come before or go ahead of something or someone in terms of order, time, or position.
Example Sentence: "A warm-up should precede any exercise routine."
Synonyms: antecede; forerun; foreshadow; herald; introduce; lead
Opposite Meaning: follow

present (adjective) /ˈprɛz ənt/
Definition: Currently existing or in existence at the current moment.
Example Sentence: "The present population of the city is over two million people."
Synonyms: available; contemporary; current; existing; here; immediate
Opposite Meaning: past

prolong (verb) /prəˈlɒŋ/
Definition: To extend the duration or length of something, typically an event, a process, or a state of being.
Example Sentence: "The mechanic changed the oil regularly to prolong the engine's lifespan."
Synonyms: continue; delay; elongate; extend; increase; lengthen
Opposite Meaning: shorten

protract (verb) /proʊˈtrækt/
Definition: To prolong or extend in time.
Example Sentence: "He had to protract the meeting because some members were late."
Synonyms: continue; delay; elongate; extend; lengthen; perpetuate
Opposite Meaning: shorten

protracted (adjective) /prəˈtraktɪd/
Definition: Extended in time or duration, usually lasting longer than what is normal or expected.
Example Sentence: "The legal dispute was protracted and went to court several times."
Synonyms: chronic; continual; continued; elongated; endless; extended
Opposite Meaning: brief

recess (noun) /rɪˈsɛs/
Definition: A designated period of time during which an activity or event is temporarily suspended or a break is taken from the usual routine.
Example Sentence: "The school bell rang, signaling the start of morning recess."
Synonyms: break; breather; downtime; hiatus; interlude; intermission
Opposite Meaning: continuation

recurring (adjective) /rɪˈkɜr ɪŋ/
Definition: Happening repeatedly or returning in a cyclic or regular manner.
Example Sentence: "The recurring nightmares haunted him night after night."
Synonyms: continual; cyclic; frequent; habitual; iterative; ongoing
Opposite Meaning: one-time

sequel (noun) /ˈsiːkw(ə)l/
Definition: A work of art, such as a book, movie, or video game, that continues the story or plot of a previous work.
Example Sentence: "Fans of the book eagerly awaited the release of its sequel."
Synonyms: addition; aftermath; conclusion; consequence; continuance; continuation
Opposite Meaning: precursor

simultaneous (adjective) /ˌsɪmlˈteɪnɪəs/
Definition: Happening at the same time or in perfect synchronization, without any noticeable time lag or delay.
Example Sentence: "The dancers performed simultaneous movements in perfect synchronization."
Synonyms: coexisting; coincident; coinciding; concurrent; contemporaneous; parallel
Opposite Meaning: sequential

sporadic (adjective) /spəˈradɪk/
Definition: Occurring irregularly, infrequently, and without a consistent pattern or schedule.
Example Sentence: "The sporadic availability of the product frustrated customers."
Synonyms: episodic; fitful; haphazard; infrequent; intermittent; irregular
Opposite Meaning: regular

subsequent (adjective) /sʌbsɪkwənt
Definition: Coming after or following in order or sequence.
Example Sentence: "The subsequent chapter in the book revealed the shocking twist in the plot."
Synonyms: after; consequent; ensuing; following; later; next
Opposite Meaning: preceding

subsequently (adverb) /ˈsʌb sɪ kwənt li/
Definition: Occurring after or as a result of another event or action.
Example Sentence: "She missed her flight and subsequently had to reschedule her entire itinerary."
Synonyms: afterward; afterwards; consequently; ensuing; finally; later
Opposite Meaning: previously

synchronous (adjective) /ˈsɪŋkrənəs/
Definition: Happening at the same time, in perfect coordination or synchronization with one another.
Example Sentence: "The audience was mesmerized by the synchronous movement of the dancers."
Synonyms: accompanying; coexisting; coincident; concomitant; concurrent; contemporaneous
Opposite Meaning: asynchronous

temporal (adjective) /ˈtɛmp(ə)rəl/
Definition: Relating to matters of time, duration, or the earthly, material world as opposed to the spiritual or eternal.
Example Sentence: "The temporal nature of our existence is a fundamental aspect of human philosophy."
Synonyms: brief; ephemeral; fleeting; impermanent; momentary; passing
Opposite Meaning: spiritual

thereafter (adverb) /ˌðɛərˈæf tər/
Definition: Denoting a time or event subsequent to a particular point in time.
Example Sentence: "She attended the conference, and thereafter felt inspired to change her career path."
Synonyms: afterward; afterwards; consequently; following; later; next
Opposite Meaning: beforehand

transient (adjective) /ˈtranzɪənt/
Definition: Temporary, passing, or brief in nature, often with a sense of impermanence and ephemerality.
Example Sentence: "The transient nature of the job made it difficult for him to settle down."
Synonyms: brief; cursory; ephemeral; evanescent; fleeting; fugitive
Opposite Meaning: permanent

waiting (adjective) /ˈweɪ tɪŋ/
Definition: In anticipation or expectation of something.
Example Sentence: "The passengers grew restless while waiting for their delayed flight."
Synonyms: anticipating; deferred; delayed; expecting; forthcoming; hanging
Opposite Meaning: active