The Collaborative International Dictionary of English v.0.48:

Droll \Droll\ (dr[=o]l), a. [Compar. Droller; superl.
   Drollest.] [F. dr[^o]le; cf. G. & D. drollig, LG. drullig,
   D. drol a thick and short person, a droll, Sw. troll a
   magical appearance, demon, trolla to use magic arts, enchant,
   Dan. trold elf, imp, Icel. tr["o]ll giant, magician, evil
   spirit, monster. If this is the origin, cf. Trull.]
   Queer, and fitted to provoke laughter; ludicrous from oddity;
   amusing and strange.

   Syn: Comic; comical; farcical; diverting; humorous;
        ridiculous; queer; odd; waggish; facetious; merry;
        laughable; ludicrous. -- Droll, Laughable,
        Comical. Laughable is the generic term, denoting
        anything exciting laughter or worthy of laughter;
        comical denotes something of the kind exhibited in
        comedies, something humorous of the kind exhibited in
        comedies, something, as it were, dramatically humorous;
        droll stands lower on the scale, having reference to
        persons or things which excite laughter by their
        buffoonery or oddity. A laughable incident; a comical
        adventure; a droll story.
        [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Droller \Droll"er\, n.
   A jester; a droll. [Obs.] --Glanvill.
   [1913 Webster]