Learn about the Letter M. Learn that M is a consonant in the alphabet. Learn to recognize the upper and lowercase letter M, how to write the letter M and the sound that letter M makes.
M, or m, is the thirteenth letter of the Latin alphabet, used in the modern English alphabet, the alphabets of several western European languages and others worldwide.
History, etymology, and pronunciation of m, the thirteenth letter in the alphabet. It corresponds to the Semitic mem and to the Greek mu. The Semitic form may derive from an earlier sign representing waves of water. The sound represented by the letter has been from the beginning the labial nasal.