/ ˈdændi; NAmE / noun , adjective
■ noun
( pl. -ies ) ( old-fashioned ) a man who cares a lot about his clothes and appearance
■ adjective
( old-fashioned , especially NAmE ) very good
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WORD ORIGIN
late 18th cent.: perhaps a shortened form of 17th-cent. Jack-a-dandy conceited fellow (the last element representing Dandy , a pet form of the given name Andrew ).