'counterattack' definitions:

Definition of 'counterattack'

(from WordNet)
noun
An attack by a defending force against an attacking enemy force in order to regain lost ground or cut off enemy advance units etc. [syn: counterattack, countermove]
noun
(chess) an attack that is intended to counter the opponent's advantage in another part of the board [syn: counterattack, counterplay]
verb
Make a counterattack [syn: counterattack, counterstrike]

Synonyms of 'counterattack'

From: Moby Thesaurus