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Verb: sit in
  1. Attend as a visitor
    "Can I sit in on your Intermediate Hittite class?"
  2. Participate in an act of civil disobedience
Noun: sit-in  'sit,in
  1. A form of civil disobedience in which demonstrators occupy seats and refuse to move

Derived forms: sits in, sit-ins, sitting in

Type of: attend, civil disobedience, disobey, go to

Encyclopedia: Sit in