The letter M is the 13th letter of the English alphabet and holds linguistic, cultural, and scientific significance. Its applications span communication, branding, science, and beyond. 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. 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. Do you want to join Facebook? Sign Up Meta © 2026 Your personalized and curated collection of the best in trusted news, weather, sports, money, travel, entertainment, gaming, and video content This letter M video by ABCmouse is full of marvelous messages that help children master learning both upper and lower case letter M. The letter M is not only the thirteenth letter in the English alphabet, but it also plays a crucial role in language by starting many common words. Get ready to explore the sound and shape of the letter M and how it fits into our daily communication! M (minuscule: 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. No other dictionary matches M-W's accuracy and scholarship in defining word meanings. Our pronunciation help, synonyms, usage and grammar tips set the standard. Go beyond dictionary lookups with Word of the Day, facts and observations on language, lookup trends, and wordplay from the editors at Merriam-Webster Dictionary. For teachers, the letter M is an essential part of literacy lessons and creative classroom activities. Marketing professionals appreciate the letter M’s visual symmetry and memorable presence, often using it to convey motion and strength in logos and ad copy. And for everyday creators making letter-themed art projects, M offers endless.