ˈstall-inU.S. [f. stall v.1 11 c + -in3.] A form of protest in which participants block the roads with immobilized vehicles. 1964[see lie-ins.v. lie n.2 6].1977Time 14 Nov. 21/3 They need hardly fear the kind of traffic stall-ins staged by New York City residents to protest the arrival of the Concorde.