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Definitions

all at once

ADVERB

concurrently

Synonyms

WEAK

all together contemporaneously jointly simultaneously synchronously unitedly

ADVERB

en masse

Synonyms

WEAK

as a body as a group as a whole as one collectively communally cooperatively en bloc ensemble in a group in chorus in unison jointly together unanimously unitedly wholly with one voice

ADVERB

ensemble

Synonyms

STRONG

altogether

WEAK

as a body as a group as a whole as one at once en masse in concert

ADVERB

mutually

Synonyms

STRONGEST

commonly jointly

STRONG

reciprocally

WEAK

as a group by agreement by contract conjointly cooperatively en masse in collaboration in combination in conjunction respectively

Antonyms

WEAK

dissimilarly distinctly

ADVERB

suddenly

Synonyms

STRONGEST

abruptly all of a sudden quickly swiftly

STRONG

short

WEAK

aback asudden forthwith on spur of moment sudden unanticipatedly unaware unawares without warning

Antonyms

WEAK

expectedly slowly

ADVERB

synchronously

Synonyms

WEAK

all together as one at one fell swoop closely coincidentally collectively combined commonly concertedly concomitantly concurrently conjointly contemporaneously en masse hand in glove hand in hand in a body in concert in cooperation in one breath in sync in tandem in unison jointly mutually on the beat side by side simultaneously synchronically unanimously unitedly with one accord with one voice with the beat

ADVERB

then

Synonyms

STRONGEST

again formerly later next suddenly

WEAK

anon at that instant at that moment at that point at that time before long on that occasion soon after thereupon when years ago

Antonyms

STRONGEST

earlier

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

It’s like trying to describe a song that exists all at once, without being performed, heard or unfolding.

From Science Daily • Jun. 8, 2026

That’s easier than asking people to commit to something very long all at once.

From Slate • Jun. 4, 2026

Instead of having to cut it all at once, it is easing back output in stages, hoping to avoid the more costly step of shutting fields and later spending weeks or months bringing them back.

From The Wall Street Journal • May 22, 2026

I have a lot of questions for you, starting with: Why did you have so much money in a CD maturing all at once?

From MarketWatch • May 11, 2026

Then all at once it didn’t taste so nasty any more.

From "Summer of the Monkeys" by Wilson Rawls

all at once

Example Sentences

Related Words