Definitions
1.noun(often in the plural) Something which is done or is to be done; business of any kind, commercial, professional, or public."a difficult affair to manage"
2.nounAny proceeding or action which it is wished to refer to or characterize vaguely."an affair of honor, a duel; an affair of love, an intrigue"
3.nounAn action or engagement not of sufficient magnitude to be called a battle.
4.nounA material object (vaguely designated)."He used a hook-shaped affair with a long handle to unlock the car."
5.nounAn adulterous relationship. (from affaire de cœur).
6.nounA romantic relationship with someone who is not one's regular partner (boyfriend, girlfriend).
7.nounA person with whom someone has an adulterous relationship.
8.nounA party or social gathering, especially of a formal nature.
9.nounThe (male or female) genitals.