The definition of mirthful is someone or something full of humor or laughter.
An example of mirthful is a person who is laughing and giggling.
full of, expressing, or causing mirth; merry
- Full of gladness and merriment.
- Characterized by or expressing gladness and merriment: a warm, tender, and mirthful movie.
(comparative mirthfuller or more mirthful, superlative mirthfullest or most mirthful)
From mirth +"Ž -ful.