once

adverb
\ ˈwən(t)s How to pronounce once (audio) \

Definition of once

 (Entry 1 of 4)

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

once

noun

Definition of once (Entry 2 of 4)

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

once

adjective

Definition of once (Entry 3 of 4)

: that once was : former a once successful actor

Definition of once (Entry 4 of 4)

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

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Synonyms for once

Synonyms: Adverb

erstwhile, formerly, onetime

Synonyms: Adjective

erstwhile, former, late, old, onetime, other, past, quondam, sometime, whilom

Synonyms: Conjunction

as soon as, immediately [chiefly British], instantly, when

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Examples of once in a Sentence

Adverb

I will repeat the question once. The play was performed only once. She didn't once thank me. He didn't look at me once. It was once done that way. A river once flowed through this canyon. It was once a booming mining town. Their music was once very popular.

Noun

I have tried Indian food more than once. Please be on time just this once. For once you seem to know what I'm talking about.

Adjective

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

Conjunction

Once she spoke, I recognized her. you should have stopped wrestling once you knew someone was getting hurt, not five minutes later
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Recent Examples on the Web: Adverb

Maddox Kopp and Spencer Kryger threw touchdown passes, while Cameron Bonner scored twice, Joshua Crissmon scored once and Paul Langemeier kicked two field goals. Jack Marrion, Houston Chronicle, "Stratford football stifles Spring Woods in District 17-6A opener," 16 Sep. 2019 After two games, quarterback Jimmy Garoppolo has been sacked once and taken three hits on 53 dropbacks. Eric Branch, SFChronicle.com, "Joe Staley suffers broken fibula in 49ers’ blowout win," 15 Sep. 2019 High school activists are marching in our cities, challenging their leaders to act once and for all. Anne Hidalgo, Time, "How Paris is Actually Walking the Climate-Change Walk," 12 Sep. 2019 Those in the study who occasionally napped—once or twice a week, for around five minutes up to one hour—were 48% less likely to suffer a heart attack, stroke, or heart failure than those who did not nap at all. Elizabeth Gulino, House Beautiful, "Science Says Daytime Naps Twice a Week Can Lead to a Healthier Heart," 10 Sep. 2019 Both farmers and chefs are powered by a resilient spirit that can be witnessed in real time, as La Placita de Santurce is packed once more with dancers balancing flaky empanadillas and Medalla beer. Aliza Abarbanel, Bon Appétit, "Where to Eat in San Juan, Where Restaurants Aren’t Just Rebuilding—They’re Thriving," 10 Sep. 2019 That group will once again be culled; the Air Force will fly the winners out to Defcon for a live hacking competition. Wired, "The Air Force Will Let Hackers Try to Hijack an Orbiting Satellite," 17 Sep. 2019 The Travelers Championship was once again a huge success on and off the course, with this year’s event raising $2.1 million for 150 local charities, tournament officials announced Tuesday. Chris Brodeur, courant.com, "Travelers Championship raises $2.1 million for 150 local charities," 17 Sep. 2019 There was the woman, once again, disclosing her pain. Megan Garber, The Atlantic, "How Brett Kavanaugh Got the Last Laugh," 17 Sep. 2019

Recent Examples on the Web: Noun

The second-year quarterback completed 10 of 13 passes for 113 yards, led two scoring drives in three series of action and once again showed play-making ability with his feet. Dave Birkett, Detroit Free Press, "Detroit Lions' stock watch: Rookie LB Jalen Reeves-Maybin a bright spot," 25 Aug. 2017

Recent Examples on the Web: Adjective

And Michigan's gone through spring drills without a clear answer of who will realistically be the front-runner once summer begins. Nick Baumgardner, Detroit Free Press, "Michigan football's Shea Patterson still competing despite unclear situation," 12 Apr. 2018

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.

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First Known Use of once

Adverb

12th century, in the meaning defined at sense 1

Noun

13th century, in the meaning defined at sense 1

Adjective

1620, in the meaning defined above

Conjunction

1747, in the meaning defined above

History and Etymology for once

Adverb, Noun, Adjective, and Conjunction

Middle English ones, from genitive of on one

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More Definitions for once

once

adverb

English Language Learners Definition of once

 (Entry 1 of 3)

: one time only
: at any one time
: at some time in the past

once

noun

English Language Learners Definition of once (Entry 2 of 3)

: one single time

English Language Learners Definition of once (Entry 3 of 3)

: at the moment when : as soon as

once

adverb
\ ˈwəns How to pronounce once (audio) \

Kids Definition of once

 (Entry 1 of 3)

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.

once

noun

Kids Definition of once (Entry 2 of 3)

: 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 sense 2 Leave at once.

Kids Definition of once (Entry 3 of 3)

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

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More from Merriam-Webster on once

Thesaurus: All synonyms and antonyms for once

Spanish Central: Translation of once

Nglish: Translation of once for Spanish Speakers

Britannica English: Translation of once for Arabic Speakers

Comments on once

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