Labial a. : Of or pertaining to the lips or labia; as, labial veins.

Labial a. : Furnished with lips; as, a labial organ pipe.

Labial a. : Articulated, as a consonant, mainly by the lips, as b, p, m, w.

Labial a. : Modified, as a vowel, by contraction of the lip opening, as / (f/d), / (/ld), etc., and as eu and u in French, and o, u in German. See Guide to Pronunciation, // 11, 178.

Labial a. : Of or pertaining to the labium; as, the labial palpi of insects. See Labium.

Labial n. : A letter or character representing an articulation or sound formed or uttered chiefly with the lips, as b, p, w.

Labial n. : An organ pipe that is furnished with lips; a flue pipe.

Labial n. : One of the scales which border the mouth of a fish or reptile.

Example:
How long will my gums be red after a Labial frenectomy?

Taxonomy
bilabial, labiodental, articulation, languages, Labial consonant, fricatives, free encyclopedia, English, consonants, lips, bilabial approximant, The Sounds of the World's Languages, bilabial nasal, voiced bilabial approximant, Labial consonants, lower lip, standard English, search.

Defination from the web:
Labial-palatal. Velar. Uvular. Uvular-epiglottal. • Radical. Pharyngeal. Epiglotto-pharyngeal. Epiglottal. • Glottal ... For by far the most languages in the world, labial by itself is a sufficient phonemic specification. ...