1) Articulated with both lips 2) Labial 3) Labial consonant 
In phonetics, a sound such as /p/, /b/, or /m/ that requires both the upper and lower lip to articul
[adj] - of or relating to or being a speech sound that is articulated using both lips 2. [n] - a consonant that is articulated using both lips
adjective of or relating to or being a speech sound that is articulated using both lips; `bilabial fricatives`
Any sound produced using both lips, e.g. [p] oder [m].