The Collaborative International Dictionary of English v.0.48:

Joke \Joke\, v. t. [imp. & p. p. Joked; p. pr. & vb. n.
   Joking.]
   To make merry with; to make jokes upon; to rally; to banter;
   as, to joke a comrade.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

joking \joking\ adj.
   intended as a joke; -- of communications.

   Syn: jesting, jocose, jocular, jocund.
        [WordNet 1.5 +PJC]

   no joking matter a serious matter.
      [PJC]

WordNet (r) 3.0 (2006):

joking
    adj 1: characterized by jokes and good humor [syn: jesting,
           jocose, jocular, joking]