a. 1. Full of mirth or merriment; merry; as, mirthful children. [ 1913 Webster ]
2. Indicating or inspiring mirth; as, a mirthful face. [ 1913 Webster ]
Mirthful, comic shows. Shak. [ 1913 Webster ]
-- Mirth"ful*ly, adv. -- Mirth"ful*ness, n. [ 1913 Webster ]