labial: Meaning and Definition of

la•bi•al

1. of, pertaining to, or resembling a labium.
2. of or pertaining to the lips.
3. involving lip articulation, as p, v, m, w, or a rounded vowel.
4. 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.