ˈoutrush,n. [out- 7.] A rushing out; a violent outflow. 1872Proctor Ess.Astron. xix. 236 Direct evidence of an outrush of matter.1876Geo. Eliot Dan. Der. v, A perceptible outrush of imprisoned conversation.1898Century Mag. Jan. 405/2 The outrush of the air from the lock.