1

once

adverb \ ˈwən(t)s \
Updated on: 6 Dec 2017

Definition of once

1 : one time and no more
  • rode a horse only once
  • went skydiving once
2 : at any one time : under any circumstances : ever
  • didn't once thank me
3 : at some indefinite time in the past : formerly
  • was once a booming mining town
4 : by one degree of relationship
  • first cousin once removed
once and for all
1 : with finality : definitively
  • The team proved once and for all that they are the best.
2 : for the last time
  • I'm telling you once and for all that I'm not going.
once in a while
: now and then
  • spent most of their time at home, but went out once in a while

Examples of once in a Sentence

  1. I will repeat the question once.

  2. The play was performed only once.

  3. She didn't once thank me.

  4. He didn't look at me once.

  5. It was once done that way.

  6. A river once flowed through this canyon.

  7. It was once a booming mining town.

  8. Their music was once very popular.

Recent Examples of once from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'once.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Origin and Etymology of once

Middle English ones, from genitive of on one

once Synonyms


2

once

noun

Definition of once

: one single time : one time at least
  • Please be on time this once.
at once
1 : at the same time : simultaneously
3 : 2both
  • at once funny and sad

Examples of once in a Sentence

  1. I have tried Indian food more than once.

  2. Please be on time just this once.

  3. For once you seem to know what I'm talking about.

Recent Examples of once from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'once.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Origin and Etymology of once

see 1once


3

once

adjective

Definition of once

: that once was : former
  • a once successful actor

Examples of once in a Sentence

  1. the once child star is now a lawyer in the entertainment industry

Origin and Etymology of once

see 1once


4

once

conjunction

Definition of once

: at the moment when : as soon as
  • Once she spoke, I recognized her.

Examples of once in a Sentence

  1. Once she spoke, I recognized her.

  2. you should have stopped wrestling once you knew someone was getting hurt, not five minutes later

Origin and Etymology of once

see 1once

once Synonyms

Synonyms
as soon as, immediately [chiefly British], instantly, when
Near Antonyms
after, directly [chiefly British], since


ONCE Defined for English Language Learners

once

adverb

Definition of once for English Language Learners

  • : one time only

  • : at any one time

  • : at some time in the past


once

noun

Definition of once for English Language Learners

  • : one single time


once

conjunction

Definition of once for English Language Learners

  • : at the moment when : as soon as


ONCE Defined for Kids

1

once

adverb \ ˈwəns \

Definition of once for Students

1 : one time only
  • It happened just once.
2 : at some time in the past : formerly
  • It was once done that way.
3 : at any one time : ever
  • She didn't once thank me.
once and for all
: now and for the last time That should solve the problem once and for all.
once in a while
: from time to time I play golf once in a while.

2

once

noun

Definition of once for Students

: one single time
  • We can make an exception just this once.
at once
1 : at the same time
  • I can't understand with both of you talking at once.
2 : immediately 2
  • Leave at once.

3

once

conjunction

Definition of once for Students

: as soon as : when
  • Once you've finished your homework, you may go outside.


Seen and Heard

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