Affair definition

afere, affere, afaire, affaire, from a faire to do; Latin ad- + facere to do. See Fact, and confer Ado.

That which is done or is to be done; matter; concern; business of any kind, commercial, professional, or public; — often in the plural.

a difficult affair to manage
Any proceeding or action which it is wished to refer to or characterize vaguely.

an affair of honor, i. e., a duel

an affair of love, i. e., an intrigue.
An action or engagement not of sufficient magnitude to be called a battle.
A material object (vaguely designated).

He used a hook-shaped affair with a long handle to unlock the car.
An adulterous relationship. (from affaire de coeur.)