1. [noun] (uncountable) Organized, large-scale, armed conflict between countries or between national, ethnic, or other sizeable groups, usually involving the engagement of military forces.
2. [noun] (countable) A particular conflict of this kind.
3. [noun] (countable) By extension, any conflict, or anything resembling a conflict.
4. [noun] (figuratively) A campaign against something.
5. [noun] (business) (countable) A bout of fierce competition in trade.
6. [noun] (obsolete) (uncountable) Instruments of war.
7. [noun] (obsolete) Armed forces.
8. [noun] (uncountable) A particular card game for two players, notable for having its outcome predetermined by how the cards are dealt.
9. [verb] (intransitive) To engage in conflict (may be followed by 'with' to specify the foe).
10. [verb] To carry on, as a contest; to wage.
11. [noun] The waging of armed conflict against an enemy; 'thousands of people were killed in the war'.
12. [noun] 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'.
13. [noun] An active struggle between competing entities; 'a price war'; 'a war of wits'; 'diplomatic warfare'.
14. [noun] A concerted campaign to end something that is injurious; 'the war on poverty'; 'the war against crime'.
15. [verb] Make or wage war.
