To fight with someone; to duel.
Used other than figuratively or idiomatically: see cross, sword., to place or hold two swords so they cross each other.
For males, to urinate simultaneously such that the streams intersect.
To quarrel or argue with someone; to have a dispute with someone.
To enter into an armed conflict.
(of a person) To depart, typically from one's home, to join an army at war.