1. to join battle; to fight, clash; to skirmish. 2. to quarrel, clash, cross swords, lock horns. 3. /la/ (for one thing) to contradict, be the contradictory of, be in conflict with, conflict with, run counter to (another). 4. /la/ (for one thing) to fall at the same time as, conflict with (another). 5. (for the ends of objects) to touch each other. 6. (for glances) to meet.