In phonetics and phonology, a bilabial stop is a type of consonantal sound, made with both lips (hence bilabial), held tightly enough to block the passage of air (hence a stop consonant). The most common sounds are the stops and , as in English pit and bit, and the voiced nasal . More generally, several kinds are distinguished:
- , voiceless bilabial plosive
- , voiced bilabial plosive
- , voiced bilabial nasal
- , voiceless bilabial nasal
- , voiced bilabial implosive
- , bilabial ejective (rare)
- or , voiceless bilabial implosive (very rare)