bilabial /baɪˈleɪ.bi.əl/adjective 1noun 1forms 1 adjective1 •Articulated with both lips."Oh, yes. He talks a lot about phonemes and semantemes and bilabial fricatives. He has a van with recording apparatus in it. He's a good chap." — 1959 noun1 •A speech sound articulated with both lips. formsbilabials
