Antonyms for at once

Grammar : Adj, adv

Spell : wuhns

Phonetic Transcription : wʌns

Definition of at once

Origin : c.1200, anes, from ane "one" (see one ) + adverbial genitive. Replaced Old English æne. Spelling changed as pronunciation shifted from two syllables to one after c.1300. Pronunciation change to "wuns" parallels that of one. As an emphatic, meaning "once and for all," it is attested from c.1300, but this now is regarded as a Pennsylvania German dialect formation. Meaning "in a past time" (but not necessarily just one time) is from mid-13c.
Once upon a time as the beginning of a story is recorded from 1590s. At once originally (early 13c.) meant "simultaneously," later "in one company" (c.1300), and preserved the sense of "one" in the word; the phrase typically appeared as one word, atones; the modern meaning "immediately" is attested from 1530s.

As in immediate : adj instantaneous; without delay
As in instantly : adv right now
As in now : adv presently
As in posthaste : adv fast
As in promptly : adv immediately
As in readily : adv quickly; effortlessly
As in right : adv directly, without delay
As in straight : adv immediately, directly
As in instantaneously : adv promptly
As in right off the bat : adv without delay
As in tout de suite : adv immediately
As in now : adv immediately
As in hand over fist : adv at a tremendous rate
As in in a moment : adv at any moment
As in right off : adv directly
As in straight off : adv directly
As in straightaway : adv directly
As in directly : adv as soon as possible
As in early : adv immediately
As in ensemble : adv at the same time
As in forthwith : adv immediately

Synonyms for at once

Based on : Thesaurus.com - Gutenberg.org - Dictionary.com - Random House Unabridged Dictionary, © Random House, Inc. 2019