Other forms: favored; favors; favoring
A favor is an act of kindness, like doing your friend a favor by letting her borrow your calculator to take the big math test.
Favor can be used as a noun: an advantage, like having experience in your favor when you apply for a job; a nice gesture, like giving your friend a ride to school; or a party favor, a little gift you get at a party. As a verb, favor means "like the most," like foods you favor, or "treat gently," like favoring your right leg when walking because it hurts to put weight on it.