- The definition of a sit in is a method of protesting where the protestors sit down at a certain spot and refuse to leave.
An example of a sit in is when those protesting unsafe conditions at a factory sit on the steps of the factory building and refuse to move.
- An organized protest demonstration in which participants seat themselves in an appropriate place and refuse to move.
- The act of occupying the seats or an area of a segregated establishment to protest racial discrimination.
(third-person singular simple present sits in, present participle sitting in, simple past and past participle sat in)
- (idiomatic) To attend something for one time, as a visitor.