Definition of 'shut up'

Verb

1. refuse to talk or stop talking; fall silent; "The children shut up when their father approached"
      Synonyms: close up clam up dummy up belt up button up be quiet keep mum
      Antonyms: open up
2. place in a place where something cannot be removed or someone cannot escape; "The parents locked her daughter up for the weekend"; "She locked her jewels in the safe"
      Synonyms: lock in lock away lock put away shut away lock up
3. cause to be quiet or not talk; "Please silence the children in the church!"
      Synonyms: hush quieten silence still hush up
      Antonyms: louden

Adjective

1. closely confined
      Synonyms: pent

---