harlequin n.[SE Harlequin, a character in English pantomime who wears parti-coloured, bespangled tights; the shininess, and thus the colours reflected in it](orig. theatre) a sovereign.Show quotations1889–90Barrère & Leland Dict. of Sl., Jargon and Cant. 1890–1904Farmer & Henley Sl. and Its Analogues.