Search Result for "war zone":
Wordnet 3.0

NOUN (1)

1. a combat zone where military operations are coordinated (especially a designated area in international waters where the rights of neutrals are not respected by nations at war); 



WordNet (r) 3.0 (2006):

war zone
    n 1: a combat zone where military operations are coordinated
         (especially a designated area in international waters where
         the rights of neutrals are not respected by nations at war)