Definition of fight with
1
: to fight against (someone or something)
- He fought with his wife over/about money.
- The U.S. fought with Germany in World Wars I and II.
- He fought with several worthy opponents.
2
: to fight on the same side as (someone or something)
- The U.S. fought (together) with the Soviet Union in World War II.
3
: to fight by using (something, such as a weapon)
- They were fighting with knives.
- They fought with their fists.
