Definition of At once

Babylon English Dictionary
immediately, right now; all at once, all together, at the same time
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At once Definition from Arts & Humanities Dictionaries & Glossaries
English-Latin Online Dictionary
simul, statim, continuo
At once Definition from Language, Idioms & Slang Dictionaries & Glossaries
hEnglish - advanced version

at once
adv
1. without delay; with no time intervening; "he answered immediately"; "found an answer straightaway"; "an official accused of dishonesty should be suspended forthwith"; "come here now!" [syn: immediately, instantly, straightaway, straight off, directly, now, right away , forthwith, in real time]


2. simultaneously; "he took three cookies at a time" [syn: at a time , at one time]



ENGLISH IDIOMS 2.EDITION
at the same time, simultaneously You can't do two things at once. You can eat or talk, but not both.
English Idioms WM 1.3a
at the same time, simultaneously; now, immediately
You can't do two things at once. You can eat or talk, but not both.
Your mother said you should come in at once - immediately.
Australian Slang
have extreme good fortune
WordNet 2.0

Adverb
1. 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!"
(synonym) immediately, instantly, straightaway, straight off, directly, now, right away, forthwith, in real time, like a shot
2. simultaneously; "he took three cookies at a time"
(synonym) at a time, at one time