Muse(noun) a gap or hole in a hedge, hence, wall, or the like, through which a wild animal is accustomed to pass; a muset. Muse(noun) one of the nine goddesses who presided over song and the different kinds of poetry, and also the arts and sciences; -- often used in the plural. Muse(noun) a particular power and practice of poetry. Muse(noun) a poet; a bard. Muse(noun) to think closely; to study in silence; to meditate.