Source : Webster's Revised Unabridged Dictionary (1913)

Joyful \Joy"ful\, a.
   Full of joy; having or causing joy; very glad; as, a joyful
   heart. ``Joyful tidings.'' --Shak.

         My soul shall be joyful in my God.       --Is. lxi. 10.

         Sad for their loss, but joyful of our life. --Pope.
   -- {Joy"ful*ly}, adv. -- {Joy"ful*ness}, n.

Source : WordNet®

joyful
     adj 1: full of or producing joy; "make a joyful noise"; "a joyful
            occasion" [ant: {sorrowful}]
     2: full of high-spirited delight [syn: {elated}, {gleeful}, {jubilant}]
     3: full of or suggesting exultant happiness; "a joyful heart";
        "a joyful occasion"; "the joyous news"; "joyous laughter"
        [syn: {joyous}]