counterinvasion

noun
coun·​ter·​in·​va·​sion | \ ˌkau̇n-tər-in-ˈvā-zhən How to pronounce counterinvasion (audio) \
variants: or counter-invasion
plural counterinvasions or counter-invasions

Definition of counterinvasion

: an invasion that is undertaken by a defending force against an enemy invader Even border fortifications can permit an attacker to mass forces for invasion while allocating few forces to defend the fortified border against a counterinvasion.— James M. Garrett

First Known Use of counterinvasion

1845, in the meaning defined above

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