1. A form of civil disobedience in which demonstrators occupy seats and refuse to move
   "Students staged a sit-in at the dean's office to protest tuition hikes"

1. Attend as a visitor
   "Can I sit in on your Intermediate Hittite class?"
    
2. Participate in an act of civil disobedience
   "Students sat in at the administration building to protest tuition hikes"

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

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

Encyclopedia: Sit-in