Usually means: Refuse to speak or communicate.
Definitions Related words Phrases Mentions
We found 17 dictionaries that define the word clam up:

General (15 matching dictionaries)
  1. clam up: Merriam-Webster
  2. clam up: Oxford Learner's Dictionaries
  3. clam up: Collins English Dictionary
  4. clam up: Vocabulary.com
  5. clam up: Cambridge Advanced Learner's Dictionary
  6. clam up: Wiktionary
  7. clam up: Dictionary.com
  8. clam up: Rhymezone
  9. clam up: Phrasal Verb Page
  10. clam up: FreeDictionary.org
  11. clam up: Mnemonic Dictionary
  12. clam up: TheFreeDictionary.com
  13. clam up: Longman Dictionary of Contemporary English

Miscellaneous (1 matching dictionary)
  1. clam up: Idioms

Slang (1 matching dictionary)
  1. Clam Up: Urban Dictionary

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Definitions from Wiktionary (clam up)

▸ verb:  (intransitive, informal) To become silent; to stop talking.
▸ verb:  (ambitransitive) To make or become clammy.

Similar:
dummy up, belt up, button up, keep mum, shut up, close up, be quiet, hush up, clamor, cork up, more...

Opposite:
open up, speak up, communicate, express oneself

Phrases:
to clam up, more...

Adjectives:
bay, pit-a-pat, rapping, tappy, slam-bang, crump, clomping, thundering, crash, percussive, plinky

▸ Words similar to clam up

▸ Usage examples for clam up

▸ Idioms related to clam up

▸ Wikipedia articles (New!)

▸ Words that often appear near clam up

▸ Rhymes of clam up

▸ Invented words related to clam up

Similar:
dummy up, belt up, button up, keep mum, shut up, close up, be quiet, hush up, clamor, cork up, more...

Opposite:
open up, speak up, communicate, express oneself

Phrases:
to clam up, more...

Adjectives:
bay, pit-a-pat, rapping, tappy, slam-bang, crump, clomping, thundering, crash, percussive, plinky



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