adj furnished with lips; as, a labial organ pipe.
2. labial ·noun an organ pipe that is furnished with lips; a flue pipe.
3. labial ·adj of or pertaining to the lips or labia; as, labial veins.
4. labial ·noun one of the scales which border the mouth of a fish or reptile.
5. labial ·adj articulated, as a consonant, mainly by the lips, as b, p, m, w.
6. labial ·adj of or pertaining to the labium; as, the labial palpi of insects. ·see labium.
7. labial ·noun a letter or character representing an articulation or sound formed or uttered chiefly with the lips, as b, p, w.
8. labial ·adj 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.