(1):

(n.) A buffoon, dressed in party-colored clothes, who plays tricks, often without speaking, to divert the bystanders or an audience; a merry-andrew; originally, a droll rogue of Italian comedy.

(2):

(n. i.) To play the droll; to make sport by playing ludicrous tricks.

(3):

(v. t.) Toremove or conjure away, as by a harlequin's trick.