Synonyms & Antonyms of once

(Entry 1 of 3)

having been such at some previous time
  • the once child star is now a lawyer in the entertainment industry

Synonyms for once

Words Related to once

Near Antonyms for once



Synonyms & Antonyms of once (Entry 2 of 3)

at an earlier or previous time
  • I once knew the quotation, but time has taken its toll on my brain cells

Synonyms for once

Near Antonyms for once

Synonyms & Antonyms of once (Entry 3 of 3)

just at the moment that
  • you should have stopped wrestling once you knew someone was getting hurt, not five minutes later

Synonyms for once

Near Antonyms for once

See the Dictionary Definition 

Keep scrolling for more

Learn More about once

Time Traveler for once

Time Traveler

The first known use of once was in the 12th century

See more words from the same century

Cite this Entry

“Once.” The Thesaurus, Merriam-Webster Inc., Accessed 11 December 2019.

Keep scrolling for more

More from Merriam-Webster on once

Dictionary: Definition of once

Spanish Central: Translation of once

Nglish: Translation of once for Spanish Speakers

Britannica English: Translation of once for Arabic Speakers

Comments on once

What made you want to look up once? Please tell us where you read or heard it (including the quote, if possible).


heavy with or as if with moisture

Get Word of the Day daily email!

Test Your Vocabulary

Semantic Drift Quiz

  • a twisty river
  • Which of the following was once a synonym for fun?
Spell It

Can you spell these 10 commonly misspelled words?


Test Your Knowledge - and learn some interesting things along the way.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!