A duel.

plural of affaire d'honneur

To engage in a romantic or sexual relationship while being married.

simple past tense and past participle of have an affair

Third-person singular simple present indicative form of have an affair

present participle of have an affair

An affair that involves emotional intimacy with a person other than one's partner, but no sexual intercourse.

Alternative form of affair of honour

Synonym of affaire d'honneur (“a duel”)

Alternative form of put one's affairs in order