Webster's Revised Unabridged Dictionary · 1913

Harlequin

Harlequin (har"le*kin or har"le*kwin) , noun

[French arlequin, formerly written also harlequin (compare It, arlecchino), prob. from Old French hierlekin, hellequin, goblin, elf, which is prob. of German or Dutch origin; compare Dutch hel hell. Compare Hell, Kin.]

A buffoon, dressed in parti-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. — Percy Smith
As dumb harlequin is exhibited in our theaters. — Johnson
Collocations (8)
Harlequin bat (Zoology) , an Indian bat (Scotophilus ornatus), curiously variegated with white spots.
Harlequin beetle (Zoology) , a very large South American beetle (Acrocinus longimanus) having very long legs and antennae. The elytra are curiously marked with red, black, and gray.
Harlequin cabbage bug (Zoology) , See Calicoback.
Harlequin caterpillar (Zoology) , the larva of an American bombycid moth (Euchaetes egle) which is covered with black, white, yellow, and orange tufts of hair.
Harlequin duck (Zoology) , a North American duck (Histrionicus histrionicus). The male is dark ash, curiously streaked with white.
Harlequin moth (Zoology) , See Magpie Moth.
Harlequin opal , See Opal.
Harlequin snake (Zoology) , See harlequin snake in the vocabulary.

Harlequin (har"le*kin o -kwin) , intransitive verb

To play the droll; to make sport by playing ludicrous tricks.

Harlequin , transitive verb

To remove or conjure away, as by a harlequin's trick.
And kitten, if the humor hit Has harlequined away the fit. — M. Green