Definition of "bilabial" [bi•la•bi•al]

• Pronounced or articulated with both lips, as the consonants b, p, m, and w. (adjective)
• Relating to both lips. (adjective)
• A bilabial sound or consonant. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Yes, it's formed by closing both lips -- 'bilabial' -- rather than using tongue and teeth."
• "Point is, if the model is accurate it's like describing how sounds are articulated phonetically, how the/b/sound is a voiced bilabial plosive."
• "Perhaps the voiced bilabial plosive suggests the last and energetic verb (I know the withheld verbs create suspense)."