Harlequin meaning : A pantomime fool, typically dressed in checkered colorful clothes. A greenish-chartreuse color. A harlequin duck. Any of various riodinid butterflies of the genera Taxila and Praetaxila. To remove or conjure away, as if by a harlequin's trick. To make sport by playing ludicrous tricks. Brightly colored, especially in a pattern like that of a harlequin clown's clothes. Of a greenish-chartreuse color.