English definition of “war”
FIGHTING [C, U] › fighting, using soldiers and weapons, between two or more countries, or two or more groups inside a country: They've been at war for the past five years. He was only a child when the war broke out (= started). If this country goes to war (= starts to fight in a war), thousands of people will die.
COMPETING [C, U] › when two or more groups are trying to be more successful than each other: a price war between supermarkets