The definition of debonair is an elegant, gracious and carefree in manner.(adjective)
An example of a debonair person was Cary Grant.
See debonair in Webster's New World College Dictionary
Origin: ME debonaire < OFr < de bon aire, lit., of good breed or race: see aerie
See debonair in American Heritage Dictionary 4
Origin: Middle English debonaire, gracious, kindly
Origin: , from Old French
Origin: , from de bon aire, of good lineage or disposition
Origin: : de, of (from Latin dē; see de-)
Origin: + bon, bonne, good (from Latin bonus; see deu-2 in Indo-European roots)
Origin: + aire, nest, family; see aerie.
Learn more about debonair