Tra từ instant - Từ điển Oxford Advanced Learner 8th

in·stant [instant instants] adjective, noun BrE [ˈɪnstənt] NAmE [ˈɪnstənt]
adjective
1. usually before noun happening immediately
Syn: ↑immediate
•She took an instant dislike to me.
•This account gives you instant access to your money.
•The show was an instant success.
2. only before noun (of food)that can be made quickly and easily, usually by adding hot water
•instant coffee

Word Origin:
late Middle English: via Old French from Latin instant- ‘being at hand’, from the verb instare, from in- ‘in, at’ + stare ‘to stand’.

Example Bank:
•She took an instant dislike to me, the first time we met.
•The show was an instant success in New York.
•There is no instant solution to the problem of rising crime.

noun usually singular
1. a very short period of time
Syn: ↑moment
•I'll be back in an instant.
•Just for an instant I thought he was going to refuse.
2. a particular point in time
•At that (very) instant, the door opened.
•I recognized her the instant (that) (= as soon as) I saw her.
•Come here this instant! (= immediately)

Word Origin:
late Middle English: via Old French from Latin instant- ‘being at hand’, from the verb instare, from in- ‘in, at’ + stare ‘to stand’.

Example Bank:
•At any given instant the distribution of molecular speeds is always constant under the same conditions.
•For a brief instant, I thought she was going to fall.
•He paused for an instant before continuing.
•He took out his keys to lock the door. At that very instant the door flew open and a man ran into the room.
•His news was too important to be contained for a single instant longer.
•It was all over in an instant.
•She woke up in the instant before the phone rang.
•The bomb could go off at any instant.
•The next instant she was flying through the air.
•Come here this instant!
•I recognized her the instant (that) I saw her.