Source : Webster's Revised Unabridged Dictionary (1913)

Mirthful \Mirth"ful\, a.
   1. Full of mirth or merriment; merry; as, mirthful children.

   2. Indicating or inspiring mirth; as, a mirthful face.

            Mirthful, comic shows.                --Shak.
      -- {Mirth"ful*ly}, adv. -- {Mirth"ful*ness}, n.

Source : WordNet®

mirthful
     adj 1: full of or showing high-spirited merriment; "when hearts
            were young and gay"; "a poet could not but be gay, in
            such a jocund company"- Wordsworth; "the jolly crowd
            at the reunion"; "jolly old Saint Nick"; "a jovial old
            gentleman"; "have a merry Christmas"; "peals of merry
            laughter"; "a mirthful laugh" [syn: {gay}, {jocund}, {jolly},
             {jovial}, {merry}]
     2: arousing or provoking laughter; "an amusing film with a
        steady stream of pranks and pratfalls"; "an amusing
        fellow"; "a comic hat"; "a comical look of surprise";
        "funny stories that made everybody laugh"; "a very funny
        writer"; "it would have been laughable if it hadn't hurt
        so much"; "a mirthful experience"; "risible courtroom
        antics" [syn: {amusing}, {comic}, {comical}, {funny}, {laughable},
         {risible}]