[sit-down] adj (ca. 1837): served to seated diners "a ~ dinner"; also: of, relating to, or serving sit-down meals "a ~ restaurant"
[2]sit-down n (1936) 1: a cessation of work by employees while maintaining continuous occupation of their place of employment as a protest and means toward forcing compliance with demands
2: a mass obstruction of an activity by sitting down to demonstrate a grievance or to get the activity modified or halted