1. a romantic or sexual relationship, especially a secret one
Usage: from French
2. a matter of concern or business
Usage: from French; formal

Examples

• The scandal involved a secret affaire between two prominent politicians.
• She ended the affaire after realizing it was going nowhere.
• The diplomat handled the delicate affaire with great discretion.
• Their brief affaire caused quite a stir in the small town.
• He considered it a private affaire that was nobody else’s business.
• The affaire dominated the headlines for weeks.