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at once

at once

287 1.8
At the same time
  • idiom
  • /ət wʌns/
translation icon : a la vez
  • All of life is at once biological and social.
  • all at once
  • happen all at once
  • several at once

Do fewer things at once, right?

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Examples

  • Can I do three things at once and get that going?

  • We can't have everybody talking at once.

  • We're going to do both at once, both of them.

  • Guys, you can only play one game at once, right?

  • And like it's all the relationships at once that have to work.

  • Well, great things happen all at once.

  • We tell everybody at once!

  • Rather, all human efforts to develop culture are at once both spiritual and natural.

    Academic text (2008)
  • I have never felt that many emotions at once prior to finding out.

  • If everyone speaks at once, it becomes very disorderly.

Synonyms

at the same time
vsat once
1.0

During the same time or moment

is the concise single-word alternative expressing identical timing
at a time
vsat once
768 1.0

Together in a single group

leans more to exact same-time meaning rather than grouping sense
together
vsat once
511 1.0

At the same time as someone or something else

is focused on exact simultaneity rather than general group action
instantly
vsat once
330 1.0

Right away without any delay

is about being simultaneous rather than focusing on immediate speed
simultaneously
vsat once
209 4.2

At the same time

is the common phrasal way to express the same simultaneity
all at once
vsat once
43 2.1

Happening at the same time

is the shorter idiomatic expression for the same idea
at one time
vsat once
32 2.5

Happening at the same time

is used interchangeably but often stresses precise simultaneity
concurrently
vsat once
14 5.8

Happening at the same time as something else

is more neutral about overlap and focuses on exact simultaneity
in one go
vsat once
4 3.4

All at once without stopping

keeps plain simultaneity but not the single-attempt or nonstop sense
contemporaneously
vsat once
2 8.4

At the same time or during the same period

is the tighter expression for exact same instant rather than broad period
at one stroke
vsat once
1 4.7

All done at the same time with one action

contrasts by focusing on simultaneous timing without the single-action idea
synchronically
vsat once
7.9

Happening at the same time as other things

is similar but does not require deliberate synchronization

Antonyms

148 2.1

Each person does it alone rather than together

107 1.9

Handle each person or thing in turn, not all at once

Surface Forms

at once positive

Morphology

at + once

The meaning 'immediately' is directly derivable from combining 'at' (a temporal/location marker) with 'once' used in the sense 'as soon as' or 'immediately after'; together they form a standard temporal composition in English. This construction mirrors common time-expression patterns in many languages, so a B1 learner who knows both constituents would readily infer the meaning.

Etymology

At once comes from the idea of many actions happening at once — in one single moment. Imagine a crowd starting to clap 'as one' at the same time; that's why it means 'at the same time'.