Also found in: Legal.
fight with (someone or something)
1. To use something as a weapon while fighting someone or something. In this usage, a noun or pronoun can be used between "fight" and "with." Those guys fight dirty—they'll fight with bike chains, knives, anything they can get their hands on. I can't believe he fought you with his bare hands and gave you such a nasty black eye.
2. To fight with someone or an animal for possession of someone or something. Look, my two friends are fighting over you, so if you don't like either of them, say something now and spare us the drama. I think some dogs are out there fighting with each other over scraps.
fight someone or something with something
to attack or battle someone or something with something. We can't fight the enemy with clubs and pitchforks! I fought him with my bare fists.
fight with (someone or some creature) (over someone or something)
to fight with someone or an animal over who gets or keeps someone or something. The terrier fought with the collie over the piece of meat. I don't want to fight you over Harry.