Source : Webster's Revised Unabridged Dictionary (1913)

Jocular \Joc"u*lar\, a. [L. jocularis, fr. joculus, dim. of
   jocus joke. See {Joke}.]
   1. Given to jesting; jocose; as, a jocular person.

   2. Sportive; merry. ``Jocular exploits.'' --Cowper.

            The style is serious and partly jocular. --Dryden.

Source : WordNet®

jocular
     adj : characterized by jokes and good humor [syn: {jesting}, {jocose},
            {joking}]

jocular
     adv : with humor; "they tried to deal with this painful subject
           jocularly" [syn: {jocosely}]