M-Base – style of musical thought and composition developed by Steve Coleman
Madchester – fusion of EDM, psychedelic rock, and indie rock
Madrigal – style of classical singing popular in the Renaissance and Baroque eras
Mafioso rap – subgenre of gangsta rap that focuses on organized crime
Mahori – form of Thai and Khmer classical music
Makossa – Cameroonian pop
Malhun – Arab folk poetry
Maloya – style of folk developed by the slaves on the French territory of Reunion
Mambo – Cuban style of jazz
Manaschi – Kyrgyz song recital of the Epic of Manas
Mandopop – style of C-pop sung in the Mandarin language
Manele – Romani folk music
Mangue Bit – Brazilian electronic genre played in a fast-paced, punk-informed style
Manila Sound – fusion of Western rock music and traditional Filipino folk music
Mapouka – traditional folk dance music of the Aizi, Alladian, and Avikam people of the Ivory Coast
Marabi – South African style informed by blues and jazz
Maracatu – Brazilian folk dance music
Mariachi – fusion of Mexican folk music and pop music
Marrabenta – Mozambican folk dance music informed by Portuguese styles
Martial industrial – style of neo-folk informed by military marches and militaristic themes
Maskanda – South African folk music
Marinera – romantic Peruvian folk dance music
Martinetes – a capella flamenco music
Mass – Christian hymns sung by large vocal groups
Matamuerte – Garifuna folk dance music
Mathcore – fusion of metalcore and math rock
Math rock – rhythmically complex form of experimental rock
Maxixe – Brazilian folk dance music
Mazurka – Polish folk dance music
Mbalax – Senegalese folk dance music that combines traditional sabar drumming techniques with jazz, soul, rock, and Latin music
Mbaqanga – Zulu jazz style that was one of the first South African genres to achieve intertribal recognition
Mbube – South African a cappella music
Meditation – any music created to aid meditation procedures
Medieval folk rock – form of folk rock that incorporated elements of earlier folk traditions, such as Medieval, Renaissance, and Baroque music, despite what the name may suggest
Medieval metal – fusion of folk metal and Medieval folk rock
Medieval – period of Western art music ranging from the 6th to 15th centuries
Mejoranera – Panaman guitar music
Malhun – north African style of classical music that borrows from Andalusian traditions
Melam – Indian drumming style
Melodic hardcore – style of hardcore punk known for its slower, melodic guitars, juxtaposed with shouted vocals
Melodic metalcore – fusion of melodic hardcore and metalcore
Melodic – any music that utilizes melody, the combination of notes so that they are perceived as a single string of music
Memphis blues – style of blues from Memphis
Memphis soul – polished, funky style of soul from Memphis
Mento – Jamaican folk music
Merengue – Dominican folk dance music
Merengue típico – style of modern merengue that attempts to sound similar to 19th century merengue
Méringue – Haitian guitar music
Metalcore – fusion of thrash metal and hardcore punk; often sung melodically
Mexican rock – rock music performed by Mexicans
Meykhana – Azerbaijani spoken word music
Mezwed – Tunisian folk music
Miami bass – rave-inspired style of hip hop
Microhouse – minimalist, stripped down form of house music
Mini-jazz – rock-inspired meringue music
Minuet – French folk dance music
Milonga – Argentinian and Uruguayan folk dance music
Min'yo – Japanese folk music
Minimal – heavily experimental form of orchestral music known for its simplicity
Minimal trance – fusion of psychedelic trance and minimal music
Minimal techno – fusion of techno and minimal music
Minstrel – American folk music which parodied African-American styles
Minneapolis sound – glam-informed style of dance-rock pioneered by Prince
Modinha – Brazilian folk music
Modern classical – loose term for orchestral music made during or after the 20th century
Modern laïka – modernized and pop-informed style of laïka
Modern rock – any rock music (usually alternative rock) made during or after the 1990s
Mor lam – Laotian and Thai folk music
Mor lam sing – fast-paced, sexual, and modernized form of mor lam
Moombahton – fusion of electro house and reggaeton
Moombahcore – moombahton incorporating dubstep influences and elements of Dutch house
Motown – slick, pop-informed form of soul music
Montuno – loose term for Cuban music and its derivatives
Morna – Cape Verdean folk music
Mozambique of Cuba – Cuban folk dance music
Mozambique of America – American derivative of the Cuban style of the same name
Mugham – Azerbaijan classical music
Murga – Uruguayan and Argentinian folk dance music
Musette – French folk dance music
Mushroom Jazz – eclectic genre that draws from downtempo, hip hop, and world styles
Music drama – an artwork that covers all forms of art
Music hall – English popular music of the 19th century
Música criolla – Peruvian music informed by African, European, and Andean styles
Musica llanero – Venezuelan and Colombian folk music
Música popular brasileira – loose term for Brazilian pop music
Musiqi-e assil – Persian orchestral music
Musique concrète – heavily experimental orchestral music known for its use of electronic instruments
Muwashshah – Arabic musical poetry