MF

MF or mf may refer to:

Biology

 * Mossy fiber (disambiguation), in neuroscience
 * Mycosis fungoides, a type of skin disease
 * Myelofibrosis, a chronic clonal malignant disease
 * Microfibril rosettes, the sites of cellulose microfibril synthesis in plants

Companies, organizations, and politics

 * MF Dow Jones News, an Italian financial news agency
 * MF Milano Finanza, an Italian business newspaper
 * MF Global (also Man Financial), a former finance company NYSE listed as MF
 * MF Norwegian School of Theology
 * Massey Ferguson, an agricultural equipment company
 * Methuselah Foundation, a non-profit volunteer organization devoted to anti-aging research
 * Micro Focus, a software company
 * Minority Front, a South African political party
 * Mitsubishi Fuso Truck and Bus Corporation, a Japanese manufacturer of trucks and buses
 * Mitsubishi Fuso Truck of America, Inc., a North American subsidiary
 * Mladá fronta DNES, a Czech newspaper
 * Musical Fidelity, a British high-end audio equipment manufacturer
 * Xiamen Airlines (IATA airline designator MF)
 * Muslims of France, a religious organization in France

Computing

 * MF and .mf, the country code and Internet top level domain for Saint Martin
 * Mainframe computer
 * MediaFire, a file hosting, file synchronization, and cloud storage service
 * Metafont, a font-definition programming language
 * Mozilla Firefox, a web browser
 * Multi-frequency, in telephony

Music

 * Mezzo forte (musical notation), a dynamic marking
 * Maynard Ferguson (1928–2006), trumpeter and bandleader
 * Melodifestivalen, the Swedish preselection for the Eurovision Song Contest
 * MF Doom (Daniel Dumile, born 1974), British-born hip hop recording artist
 * MF Grimm (born 1970), hip-hop artist
 * Mylène Farmer (born 1961), Canadian-born French singer and songwriter

Television

 * Making Fiends (TV series), an American animated horror comedy
 * Modern Family, an American sitcom
 * Monster Force, a 1994 animated television series
 * "Murder Family", the 2020 premiere episode of Helluva Boss

Video games

 * Metroid Fusion

Other uses

 * M/F, a novel by Anthony Burgess
 * m/f: a feminist journal, a British feminist magazine
 * MF or M/F, ship prefix for a motor ferry
 * Megafarad (MF), an SI unit of electric capacitance
 * Millifarad (mF), an SI unit of electric capacitance
 * The prefix for steel-wheel rolling stock on the Paris Métro
 * Monday–Friday (M–F), abbreviation for the American workweek
 * Mandatory frequency airport, a non-towered airport that requires aircraft to communicate on a published frequency
 * Manual focus
 * Master of forestry
 * Mayotte, France (FIPS PUB 10-4 territory code MF)
 * Medium format (film), a size of camera
 * Medium frequency, radio transmissions between the frequencies of 300 kHz and 3000 kHz
 * Membership function, in control engineering, in fuzzy sets
 * Midfielder, a playing position in association football
 * Milk fat, on dairy product labels in Canada
 * Motherfucker, an insult
 * Mutual fund, in finance
 * Member of the Folketing