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English definition of “at”

at

preposition (TIME)    weak /ət/ strong /æt/
A1 used to show an exact or a particular time: There's a meeting at 2.30 this afternoon. Are you free at lunchtime? In theory, women can still have children at the age of 50. The bells ring at regular intervals through the day. At no time/point did the company do anything illegal. I'm busy at the moment (= now) - can you call back later? It's a shame I wasn't here to meet you - I was in London at the time (= then).Describing when something happened or will happen Grammar:AtAt is a preposition. We use at to refer to time or place. We also use it to refer to activities.See moreGrammar:At: timeWe use at to talk about points in time, ages and some periods of time:See moreGrammar:At: placeWe use at to describe a position or location seen as a point:See moreGrammar:At: group activitiesWe use at to refer to activities which involve a group of people:See moreGrammar:Good at, bad atWe use adjective + at to talk about things that we do well or badly:See moreGrammar:At: numbersIn specific contexts, we use at with numbers.See moreGrammar:At: directionWe use at after a verb when we are talking about directing something towards another person or thing, often with verbs of perception and communication (smile at, shout at, wave at):See moreGrammar:At or at theWhen we talk about buildings, we often use at the to refer to the building itself. When we refer to the activity that happens in the building, we don’t use the after at or in:See moreGrammar:At: typical errorsSee moreGrammar:At, on and in (time)We use at:See moreGrammar:Other uses of in with timeWe use in to say how long it takes someone to do something:See moreGrammar:Time expressions without at, on, inWe don’t normally use at, on or in before time expressions beginning with each, every, next, last, some, this, that, one, any, all:See moreGrammar:At, on and in (time): typical errorsSee more
(Definition of at preposition (TIME) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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