The New Dictionary of Cultural Literacy, Third Edition. 2002.
sit-ins
A form of nonviolent protest, employed during the 1960s in the civil rights movement and later in the movement against the Vietnam War. In a sit-in, demonstrators occupy a place open to the public, such as a racially segregated (seesegregation) lunch counter or bus station, and then refuse to leave. Sit-ins were designed to provoke arrest and thereby gain attention for the demonstrators cause.