Longman Dictionary of Contemporary English - warfare

~ n 1 a word meaning the activity of fighting in a war, used especially when talking about particular methods of fighting  (nuclear/chemical/trench warfare)  (the terrible prospect of large-scale nuclear warfare | guerrilla warfare (=warfare by small groups of fighters in mountains, forests etc)) 2 a continuous struggle between groups, countries etc  (political warfare)  (- see also psychological warfare psychological (3))