2021-6-23 · To defeat decisively. The army quashed the rebellion. a. 1677, Isaac Barrow, Of Contentment (sermon) Contrition is apt to quash or allay all worldly grief. 2014 November 17, Roger Cohen, "The horror! The horror! The trauma of ISIS [print version: International New York Times, 18 November 2014, p. 9]", in The New York Times[1]: the quashing of a ...