Definition of debonair

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deb·o·nair also deb·o·naire    (db-nâr) KEY 

ADJECTIVE:

1. Suave; urbane.
2. Affable; genial.
3. Carefree and gay; jaunty.

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ETYMOLOGY:
Middle English debonaire, gracious, kindly, from Old French, from de bon aire, of good lineage or disposition : de, of (from Latin d; see de-) + bon, bonne, good (from Latin bonus; see deu-² in Indo-European roots) + aire, nest, family ; see aerie

OTHER FORMS:
debo·nairly(Adverb), debo·nairness(Noun)