Entry 2 senses · 2 variants Webster, 1913 bilabial · bi·la·bi·al · IPA /baɪˈleɪ.bi.əl/ adj. n. 01 adj. produced using both lips; -- said of a consonant. As, bilabial fricatives. 1. produced using both lips; -- said of a consonant. As, bilabial fricatives.(Linguistics) 02 n. a consonant that is articulated using both lips, as p or b or w. 1. a consonant that is articulated using both lips, as p or b or w.(Linguistics)