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Definition of instant noun from the Oxford Advanced Learner's Dictionary

instant

noun
 
/ˈɪnstənt/
 
/ˈɪnstənt/
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  1. [countable, usually singular] a very short period of time synonym moment
    • in an instant I'll be back in an instant.
    • for an instant Just for an instant I thought he was going to refuse.
    Extra Examples
    • For a brief instant, I thought she was going to fall.
    • He paused for an instant before continuing.
    • Her news was too important to be contained for a single instant longer.
    • It was all over in an instant.
    Topics Timec1
    Oxford Collocations Dictionaryadjective
    • brief
    • fleeting
    • given
    verb + instant
    • hesitate for
    • pause for
    preposition
    • at…instant
    • for an instant
    • in an instant
    See full entry
  2. [countable, usually singular] a particular point in time
    • at that instant At that (very) instant, the door opened.
    • the instant (that)… I recognized her the instant (that) (= as soon as) I saw her.
    • this instant Come here this instant (= immediately)!
    Extra Examples
    • The next instant she was flying through the air.
    • The bomb could go off at any instant.
    • At any given instant the distribution of molecular speeds is always constant under the same conditions.
    • He took out his keys to lock the door. At that very instant the door flew open and a man ran into the room.
    • She woke up the instant before the phone rang.
  3. (informal)
    (also instant coffee)
    [uncountable] coffee that can be made quickly and easily by adding hot water
    • Do you want some coffee? Is instant OK?
  4. Word Originlate Middle English: via Old French from Latin instant- ‘being at hand’, from the verb instare, from in- ‘in, at’ + stare ‘to stand’.
See instant in the Oxford Advanced American DictionarySee instant in the Oxford Learner's Dictionary of Academic English
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