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1. Refuse to talk or stop talking; fall silent
   "The children shut up when their father approached";
   - close up, clam up, dummy up [N. Amer], belt up, button up, be quiet, keep mum
    
2. Place in a place where something cannot be removed or someone cannot escape
   - lock in, lock away, lock, put away, shut away, lock up
    
3. Cause to be quiet or not talk
   "Please shut up the children in the church!";
   - hush, quieten [Brit], silence, still, hush up

1. Closely confined
   - pent

1. Be quiet, stop talking
   - put a sock in it [informal]

Derived forms: shutting up, shuts up, shut up

See also: confined

Type of: confine, conquer, stamp down, subdue, suppress

Antonym: louden

Encyclopedia: Shut up, Meg