A labial fricative is a fricative consonant, whose articulation involves the lips. Several kinds can be distinguished based on whether the articulation involves only the lips or either the teeth or the tongue:

• Bilabial fricatives (articulated with both lips):
  • Voiceless bilabial fricative [ɸ]
  • Voiced bilabial fricative [β]
• Labiodental fricatives (articulated with the lower lip touching against the upper teeth):
  • Voiceless labiodental fricative [f]
  • Voiced labiodental fricative [v]
• Linguolabial fricatives (articulated with the tip or blade of the tongue against the upper lip:
  • Voiceless linguolabial fricative [θ̼] or [ɸ̺]
  • Voiced linguolabial fricative [ð̼] or [β̺]