A gracious, friendly, or obliging act that is freely granted: do someone a favor. Friendly or favorable regard; approval or support: won the favor of the monarch; looked with favor on the plan. A state of being held in such regard: a style currently in favor. Unfair partiality; favoritism. A privilege or concession. Sexual privileges, especially as granted by a woman. Something given as a token of love, affection, or remembrance. A small decorative gift given to each guest at a party. Advantage; benefit: sailed under favor of cloudless skies. Behalf; interest: an error in our favor. Obsolete A communication, especially a letter. Archaic Aspect or appearance. Archaic Countenance; face. Obsolete A facial feature. To perform a kindness or service for; oblige. See Synonyms at oblige. To treat or regard with friendship, approval, or support. To be partial to; indulge a liking for: favors bright colors. To be or tend to be in support of. To make easier or more possible; facilitate: Darkness favored their escape. To treat with care; be gentle with: favored my wounded leg. Chiefly Southern U.S. To resemble in appearance: She favors her father. Chiefly Southern U.S. To resemble another in appearance: She and her father favor. in favor of In support of; approving: We are in favor of her promotion to president. in favor of To the advantage of: The court decided in favor of the plaintiff. in favor of Inscribed or made out to the benefit of: a check in favor of a charity.