the waging of armed conflict against an enemy; 'thousands of people were killed in the war'
a legal state created by a declaration of war and ended by official declaration during which the international rules of war apply; 'war was declared in November but actual fighting did not begin until the following spring'
an active struggle between competing entities; 'a price war'; 'a war of wits'; 'diplomatic warfare'
a concerted campaign to end something that is injurious; 'the war on poverty'; 'the war against crime'