Someone debonair is charming or suave. They have good manners, and they probably look good too.

This French word has a fancy feel to it, and it is a fancy kind of word. Being debonair is a specific form of being charming that applies mostly to men. When you're debonair, you impress women, other men, and pretty much everyone with your manners, wit, and style. Debonair is a little bit of an old-fashioned word. Old movie stars like Cary Grant were often called debonair, but not many people are today.

Definitions of debonair

adj having a sophisticated charm

“a debonair gentleman”
debonaire, debonnaire, suave
(used of persons and their behavior) cultivated and genteel

adj having a cheerful, lively, and self-confident air

“"life that is gay, brisk, and debonair"- H.M.Reynolds”
chipper, debonaire, jaunty
being full of or promoting cheer; having or showing good spirits

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