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Verb: be quiet
  1. Refuse to talk or stop talking; fall silent
    - close up, clam up, dummy up [N. Amer], shut up, belt up, button up, keep mum
Interjection: be quiet
  1. Be silent
    "be quiet! Remember the people downstairs!";
    - hush, silence, sh, shh, shush [informal], whisht [UK, Ireland, dialect]

Derived forms: was quiet, being quiet, is quiet, been quiet

Encyclopedia: Be quiet