In phonetics, a bilabial consonant is a labial consonant articulated with both lips.
Bilabial consonants are very common across languages. Only around 0.7% of the world's languages lack bilabial consonants altogether, including Tlingit, Chipewyan, Oneida, and Wichita.
The bilabial consonants identified by the International Phonetic Alphabet (IPA) are:
|voiced bilabial nasal||English||man||[mæn]||man|
|m̥||voiceless bilabial nasal||Hmong||Hmoob||[m̥ɔ̃́]||Hmong|
|voiceless bilabial plosive||English||spin||[spɪn]||spin|
|voiced bilabial plosive||English||bed||[bɛd]||bed|
|voiceless bilabial fricative||Japanese||富士山 (fujisan)||[ɸuʑisaɴ]||Mount Fuji|
|voiced bilabial fricative||Ewe||ɛʋɛ||[ɛ̀βɛ̀]||Ewe|
|voiced bilabial trill||Nias||simbi||[siʙi]||lower jaw|
|ʙ̥||voiceless bilabial trill||Sercquiais||fritt||[ʙ̥rɪt]||crop|
|ɓ||voiced bilabial implosive||Jamaican Patois||beat||[ɓiːt]||beat|
|ɓ̥||voiceless bilabial implosive||Serer|
|bilabial click release (many distinct consonants)||Nǁng||ʘoe||[k͡ʘoe]||meat|
Owere Igbo has a six-way contrast among bilabial stops: [p pʰ ɓ̥ b b̤ ɓ].
The extensions to the IPA also define a bilabial percussive ([ʬ]) for smacking the lips together. A lip-smack in the non-percussive sense of the lips noisily parting would be [ʬ↓].
The IPA chart shades out bilabial lateral consonants, which is sometimes read as indicating that such sounds are not possible. The fricatives [ɸ] and [β] are often lateral, but since no language makes a distinction for centrality, the allophony is not noticeable.