a. 1. Pleased; joyful; cheerful. [ 1913 Webster ]
2. Causing joy, pleasure, or cheerfulness; having the appearance of gayety; pleasing. [ 1913 Webster ]
Of opening heaven they sung, and gladsome day. Prior.
-- Glad"some*ly, adv. -- Glad"some*ness, n. [ 1913 Webster ]
Hours of perfect gladsomeness. Wordsworth. [ 1913 Webster ]
n. The state of experiencing joy and pleasure. Syn. -- gladness, gladfulness. [ WordNet 1.5 ]