'at once' definitions:
Definition of 'at once'
(from WordNet)
adverb
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!" [syn: immediately, instantly, straightaway, straight off, directly, now, right away, at once, forthwith, like a shot]
adverb
Simultaneously; "he took three cookies at a time" [syn: at a time, at once, at one time]
Synonyms of 'at once'
From: Moby Thesaurus
- all at once,
- all together,
- amain,
- apace,
- as one,
- at a blow,
- at a stroke,
- at one blow,
- at one jump,
- at one stroke,
- at one swoop,
- at one time,
- by forced marches,
- coincidentally,
- coinstantaneously,
- concurrently,
- conjointly,
- corporately,
- cursorily,
- decisively,
- directly,
- expeditiously,
- feverishly,
- forthwith,
- furiously,
- hand over fist,
- hastily,
- helter-skelter,
- hotfoot,
- hurriedly,
- hurry-scurry,
- immediately,
- in a hurry,
- in agreement,
- in common,
- in concord,
- in no time,
- in partnership,
- in passing,
- in unison,
- inharmony,
- instanter,
- instantly,
- jointly,
- mutually,
- now,
- on the instant,
- on the run,
- on the spot,
- PDQ,
- pell-mell,
- per saltum,
- pretty damned quick,
- promptly,
- pronto,
- quickly,
- right away,
- right now,
- right off,
- simultaneously,
- slapdash,
- smartly,
- speedily,
- straightaway,
- straightway,
- subito,
- summarily,
- superficially,
- swiftly,
- then and there,
- this minute,
- this very minute,
- together,
- uno saltu,
- with a rush,
- with all haste,
- with all speed,
- with dispatch,
- with haste,
- without delay,
- without further delay