'push back' definitions:

Definition of 'push back'

(from WordNet)
noun
The act of forcing the enemy to withdraw [syn: rollback, push back]
verb
Cause to move back by force or influence; "repel the enemy"; "push back the urge to smoke"; "beat back the invaders" [syn: repel, drive, repulse, force back, push back, beat back] [ant: attract, draw, draw in, pull, pull in]