instant
Americannoun
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an infinitesimal or very short space of time; a moment.
They arrived not an instant too soon.
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the point of time now present or present with reference to some action or event.
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a particular moment.
at the instant of contact.
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a food or beverage, especially coffee, specially processed for quick preparation.
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Older Use. the present or current month.
adjective
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succeeding without any interval of time; prompt; immediate.
instant relief from a headache.
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pressing or urgent.
instant need.
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noting a food or beverage requiring a minimal amount of time and effort to prepare, as by heating or the addition of milk or water, before being served or used.
instant coffee; instant pudding.
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occurring, done, or prepared with a minimal amount of time and effort; produced rapidly and with little preparation.
an instant book; instant answers; instant history.
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designed to act or produce results quickly or immediately.
an instant lottery.
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Older Use. of the present month: inst.
your letter of the 12th instant.
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present; current.
the instant case before the court.
adverb
noun
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a very brief time; moment
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a particular moment or point in time
at the same instant
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immediately; without delay
adjective
adverb
Synonym Usage
See minute 1.
Other Word Forms
Noun Inflected Forms
Etymology
Origin of instant
First recorded in 1350–1400; from Latin instant- (stem of instāns ), present participle of instāre “to be present, urgent,” equivalent to in- in- 2 + -stā- stand + -nt- present participle suffix
Explanation
An instant is a very short time. In combinations like instant coffee and instant replay it means available right away without a wait. Instant and moment mean the same thing if you are talking about a particular time in the past like you remember the instant or moment you realized that you had won the lottery. However, the two words are very different when talking about time in the future. "I'll be there in an instant" means you're coming as quickly as possible, whereas if you say "I'll be there in a moment," someone is going to have to wait a bit for you.
Vocabulary lists containing instant
Commonly Confused Words, List 2
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Commonly Confused Words, List 4
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Novel Study: Fahrenheit 451, Part I
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Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
See Examples For:
Federal regulations require banks to keep a broad range of communications, including emails, phone recordings and instant messages, which can be used if necessary for compliance investigations.
From The Wall Street Journal ● Jul. 21, 2026
Although Argentina eventually edged the tie 3-2, Cabral's wonder goal became an instant classic and will always be talked about.
From BBC ● Jul. 20, 2026
It doesn’t take much to zhuzh up instant ramen into a genuinely good meal.
From Salon ● Jul. 19, 2026
Financial advisers love them because they offer deferred taxation and instant diversification.
From The Wall Street Journal ● Jul. 17, 2026
That way she would know the instant the housekeeper returned from wherever it was she had gone.
From "The Hidden Gallery" by Maryrose Wood
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When analyzing spacetime, do events, instants, worldlines or even spacetime as a whole exist in the same sense as places and people?
From Science Daily ● Nov. 2, 2025
In ECSE, scientists will take x-ray pictures of scale-model pits as they collapse and investigate how neutrons behave during those crucial instants before the nuclear detonation.
From Science Magazine ● Apr. 20, 2023
There’s just no comparison, and in a way it isn’t fair to test the flavor of Cometeer against powdered instants — but we did because when it comes to add-water-and-stir coffee, it’s an option.
From Los Angeles Times ● Feb. 23, 2023
For a few instants, I followed him somewhere else in my mind, down some duct of the imagination.
From New York Times ● Oct. 26, 2022
Matthos lent him a hand to help him hack over the raiL For those few instants, Black Betba and White Hart were the calm eye in the midst of the storm.
From "A Clash of Kings" by George R.R. Martin
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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.