1. (n.) That which is done or is to be done; matter; concern; as, a difficult affair to manage; business of any kind, commercial, professional, or public; -- often in the plural. At the head of affairs. Junius.

2. (n.) Any proceeding or action which it is wished to refer to or characterize vaguely; as, an affair of honor, i. e., a duel; an affair of love, i. e., an intrigue.

3. (n.) An action or engagement not of sufficient magnitude to be called a battle.

4. (n.) Action; endeavor.

5. (n.) A material object (vaguely designated).