1. Fight, battle, war
2. Competitive or opposing action of incompatibles; antagonistic state or action (as of divergent ideas, interests, or persons); mental struggle resulting from incompatible or opposing needs, drives, wishes, or external or internal demands
3. The opposition of persons or forces that gives rise to the dramatic action in a drama or fiction
1. To be in conflict.
2. To go against, as of rules and laws; SYN. run afoul, infringe, contravene.