Full Definition of LYRICISM. 1. : the quality or state of being lyric: songfulness. 2. a: an intense personal quality expressive of feeling or emotion in an art (as poetry or music).See lyricism defined for English-language learners.ADVERTISEMENT.ull Definition of LYRICISM. 1. : the quality or state of being lyric: songfulness. 2. a: an intense personal quality expressive of feeling or emotion in an art (as poetry or music). See lyricism defined for English-language learners. ADVERTISEMENT.