in a flash
- idiom
- Informal
- One minute he is on the house and in a flash, he is beside me.
- go in a flash
- come in a flash
Obviously they come in a flash, bow grab me.
- Obviously they come in a flash, bow grab me.
- The months and the years go by in a flash.
Examples
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She completed the project in a flash, impressing her boss.
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Sam felt a moment's disappointment, but it was gone in a flash.
Fiction book (1993) -
We'll be in there in a flash - oh, look at that view.
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Right, we'll be back in a flash.
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And in a flash, that summer had changed our lives.
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Okay, stay here, I'll be back in a flash.
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Because my kids will be grown up in a flash, and I will have missed it.
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I realised in a flash that I love him.
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Word spread in a flash among the residents of Dream Street Shopping Arcade.
Fiction book (1996) -
But another had carefully watched her—and in a flash, Keane understood what the princess attempted.
Fiction book (1992)
Synonyms
Moving or happening quickly
At a fast speed or without delay
Quickly and without warning
At once without waiting
Very quickly and without warning
In a very short time
Immediately without delay
Right away without any delay
Very quickly, in a short time
In a sudden way that gives no warning
Happening or done without any delay
Immediately at the exact place where something happens, often needing a quick response
Happens quickly and without warning
Quickly and smoothly
Right away without any hesitation
Very quickly, in almost no time
Happen at once without delay
Happening suddenly and without warning
To act quickly without delay
Very quickly and without hesitation
It happens very quickly with little effort
Happens almost instantly
In a very short time
To happen or be done very quickly
Very quickly, in an instant
In a very short time
Happen very fast
In a very quick way, like someone running fast
Very quickly, in almost no time
Happen very quickly in the short time it takes to blink an eye
Happens very quickly
In a very short time
Very quickly and in a hurry
It happens very quickly
In a very short time
Antonyms
How Fast
- Informal
- Informal
Surface Forms
Morphology
The meaning 'very quickly; in an instant' is directly derivable from the parts: 'flash' can mean a very short period and the pattern 'in a + time unit' yields 'within that brief moment'. This compositional temporal pattern is common across languages (e.g., Spanish 'en un instante'), so a B1 learner who knows the constituents will readily infer the meaning.
Etymology
In a flash comes from the sudden bright light of a flash, like lightning or a camera. That quick, bright moment is over almost at once, so the phrase means 'very quickly' or 'in an instant'.