A "bilabial" is a type of consonant sound produced by bringing both lips together. Common examples of bilabial sounds in the English language include the letters p, b, and m. These sounds are characterized by the closure of the lips, which creates a momentary blockage of airflow before it is released. Bilabial sounds are found in many languages around the world, making them one of the most common types of consonants. They play a crucial role in speech and phonetics, helping to form words and convey meaning. Understanding bilabials is essential for studying phonetics and linguistics.