at once

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1. One time only: once a day.
2. At one time in the past; formerly.
3. At any time; ever: Once known, his face is never forgotten.
4. By one degree of relationship: my first cousin once removed.
A single occurrence; one time: Once will have to do. You can go just this once.
As soon as; if ever; when: Once he goes, we can clean up.
Having been formerly; former: the once capital of the nation.
at once
1. All at one time; simultaneously: Everything happened at once. The view of the skyline is at once awesome, grand, and disappointing.
2. Immediately; instantly: Leave the room at once.
once more/again
1. Another time; again: Could you repeat yourself once more?
2. As usual; in typical fashion: Once more, you've proven yourself inept at chess.

[Middle English ones, from on, one, from Old English ān; see oi-no- in Indo-European roots.]
ThesaurusAntonymsRelated WordsSynonymsLegend: once - without delay or hesitationat once - without delay or hesitation; with no time intervening; "he answered immediately"; "found an answer straightaway"; "an official accused of dishonesty should be suspended forthwith"; "Come here now!" once - simultaneouslyat once - simultaneously; "he took three cookies at a time"
حالا، فَوْرا
med det sammestraks
undir eins


(wans) adverb
1. a single time. He did it once; If I could see her once again I would be happy.
2. at a time in the past. I once wanted to be a dancer.
when; as soon as. Once (it had been) unlocked, the door opened easily.
at once
immediately. Go away at once!
(just) for once
as an exception. Why can't you be nice to her for once?
once and for all
once and finally. Once and for all, I refuse!
once in a while
occasionally. I meet him once in a while at the club.
References in classic literature ?
Girls," said Meg seriously, looking from the tumbled head beside her to the two little night-capped ones in the room beyond, "Mother wants us to read and love and mind these books, and we must begin at once.
I'm glad you began at once, and hope you will keep on.
The slippers went on at once, a new handkerchief was slipped into her pocket, well scented with Amy's cologne, the rose was fastened in her bosom, and the nice gloves were pronounced a perfect fit.