noun a comic entertainer, especially one in a circus, wearing a traditional costume and exaggerated makeup
noun a comic character in commedia dell'arte and the English harlequinade, depicted as a light-hearted and nimble servant, typically dressed in a diamond-patterned costume
adjective resembling or characteristic of a harlequin; brightly colored or patterned
noun a surname or a given name, often used as a character name in literature or media