1. a person who has expert knowledge and refined taste in a particular subject, especially in the arts, food, or drink

Examples

• She is a wine connoisseur who can identify the vintage and region of any bottle.
• The art connoisseur immediately recognized the painting as a genuine Monet.
• As a coffee connoisseur, he only buys beans from specific regions.
• The restaurant attracts food connoisseurs from around the world.
• He became a connoisseur of classical music after years of study.
• The antique connoisseur could spot a fake from across the room.