Pronunciation: (lā'bē-ul),[key] —adj. 1. of, pertaining to, or resembling a labium.
2. of or pertaining to the lips.
3. Phonet.involving lip articulation, as p, v, m, w, or a rounded vowel.
4. Music.having the tones produced by the impact of a stream of air on a sharp liplike edge, as in a flute or the flue pipes of an organ.
—n.Phonet. 1. any labial consonant, esp. a bilabial.
2. any labial sound.