A strike in which workers refuse to leave the workplace until a settlement is reached WordNet 3.0 & Open English WordNet

A sit-down strike is a labour strike and a form of civil disobedience in which an organized group of workers, usually employed at factories or other centralized locations, take unauthorized or illegal possession of the workplace by "sitting down" at their stations. Wikipedia

A strike in which workers take possession of a workplace by "sitting down" Wikipedia Disambiguation

Protest where the protester sit down Wikidata

A sit-in, a protest of civil disobedience by people sitting and refusing to move. Wiktionary

A sit-in. Wiktionary (translation)