clam up


Definition of clam up 

intransitive verb

: to become silent clammed up and refused to talk

Keep scrolling for more

Synonyms & Antonyms for clam up


belt up [British], dry up, dummy up, hush, pipe down, quiet (down), shut up


speak, talk

Visit the Thesaurus for More 

Examples of clam up in a Sentence

the little girl clammed up when the doctor came into the room

First Known Use of clam up

1916, in the meaning defined above

Keep scrolling for more

Learn More about clam up

Statistics for clam up

Look-up Popularity

Time Traveler for clam up

The first known use of clam up was in 1916

See more words from the same year

Keep scrolling for more

More from Merriam-Webster on clam up

Rhyming Dictionary: Words that rhyme with clam up

Thesaurus: All synonyms and antonyms for clam up

Spanish Central: Translation of clam up

Nglish: Translation of clam up for Spanish Speakers

Britannica English: Translation of clam up for Arabic Speakers

Comments on clam up

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


amusing and light sparring with words

Get Word of the Day daily email!

Test Your Vocabulary

Late Autumn 2018 Words of the Day Quiz

  • frosted-autumn-leaves
  • Which is a synonym of yahoo?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

Word Winder's CrossWinder

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!