| Acronym | Definition |
|---|
| MF | Medium Frequency (300-3000 kHz; 1km-100m) |
| MF | Mezzo Forte (music, moderately loud) |
| MF | Mother Figure (polite form) |
| MF | My Friends (Red Hot Chili Peppers song) |
| MF | Mutual Fund |
| MF | Manual Focus |
| MF | Medium Format |
| MF | Massey Ferguson |
| MF | Metal Fingers (MF Doom hip hop artist) |
| MF | Mayotte |
| MF | Miss Fortune (gaming) |
| MF | Molecular Formula (chemistry) |
| MF | Monday through Friday |
| MF | Mainframe |
| MF | Mobile Fighter (gaming) |
| MF | Maintenance-Free |
| MF | Melodifestivalen (Swedish music competition) |
| MF | Major Function |
| MF | Moviefone |
| MF | Maynard Ferguson (jazz trumpeter) |
| MF | Ministry of Finance |
| MF | Mylene Farmer (singer) |
| MF | Metal Face (Doom) |
| MF | Mozilla Firefox (internet browser) |
| MF | Middle Finger |
| MF | MetaFrame (Citrix Systems) |
| MF | Mark For |
| MF | Managed Futures |
| MF | Master File |
| MF | Microfiltration |
| MF | Multi-Functional |
| MF | Motor Function (drawing documenting motor wiring) |
| MF | Myelofibrosis (blood disease) |
| MF | Main Floor |
| MF | Melamine-Formaldehyde |
| MF | Mycosis Fungoides (skin disease) |
| MF | Master Frame |
| MF | Male or Female? |
| MF | MasterFormat (construction specifications) |
| MF | Maintenance Factor (lighting) |
| MF | Marianne Faithfull (singer) |
| MF | Medlem af Folketinget |
| MF | Minefield |
| MF | Magic Find (gaming) |
| MF | Magic Find (Diablo II game) |
| MF | Media Format |
| MF | Magnetic Flux (physics) |
| MF | Muscle Fiber |
| MF | Management Facility |
| MF | Membrane Filter |
| MF | Matched Filter |
| MF | Mobile Facility (US DoD) |
| MF | Multifrequency |
| MF | Millennium Falcon (Star Wars) |
| MF | More Fragments (IP) |
| MF | Moonfire (gaming, World of Warcraft) |
| MF | Mountain Forum |
| MF | Magnum Force (movie) |
| MF | Maintenance Facility |
| MF | Muscle Force |
| MF | Mozilla Foundation |
| MF | Multi-Family Residential (zoning) |
| MF | Mezzanine Floor |
| MF | Main Force |
| MF | Mandatory Frequency (airport communications) |
| MF | Multiple Frequency |
| MF | Mount Fuji |
| MF | Mail Forwarder |
| MF | Main Feed |
| MF | Millennium Force (roller coaster, Cedar Point, OH) |
| MF | Median Frequency |
| MF | Mysterious Figure (gaming; Kingdom Hearts) |
| MF | Microfilaria (biology) |
| MF | Media Filter |
| MF | Mill Finish (engineering) |
| MF | Modifying Factor |
| MF | Manson Family (cult) |
| MF | Mineral Fiber (plasterboard) |
| MF | Mail Fraud |
| MF | Mozilla Firebird (internet browser) |
| MF | Millifarad |
| MF | Mucous Fistula (stomas) |
| MF | Middle French |
| MF | Metallic Finish |
| MF | Master of Forestry |
| MF | Mode Filter |
| MF | Machine Finished |
| MF | Minority Front (South Africa) |
| MF | Medal of Freedom |
| MF | Metroid Fusion (video game) |
| MF | Moisture Free |
| MF | Main Filter |
| MF | Multifield |
| MF | Mediation Function (SONET) |
| MF | Michael Finley (basketball player) |
| MF | Mixed Field (blood agglutination reaction) |
| MF | Major Frame |
| MF | Minesweeper Flags (game) |
| MF | Midnight Fury |
| MF | Minor Frame |
| MF | More Follows |
| MF | Microfiche/Microfilm |
| MF | Mission Flight Engineer (US Air Force) |
| MF | Macroeconomic Forecasting |
| MF | Motivational Force |
| MF | Melt Freeze |
| MF | Maintenance Float |
| MF | Management Finding |
| MF | Military Function |
| MF | Meter Fix |
| MF | Mattitude Follower (wrestling) |
| MF | Ministria e Financave (Albanian: Ministry of Finances, Albania) |
| MF | Mound Facility (Miamisburg, Ohio) |
| MF | Micheal Flatley (Lord of the Dance) |
| MF | Mutua Fides |
| MF | Mercury Forums |
| MF | Multi-Framed |
| MF | Middle Fork Railroad |
| MF | Merrimac Ferry (Wisconsin) |
| MF | Mahashakthi Foundation (Sri Lanka) |
| MF | Midget Peeper Radar Jam (US Navy) |
| MF | Message Forwarder (ITI) |
| MF | Multiple Formulation |
| MF | Methylphosphono-Fluoridic Acid |
| MF | Message Forthcoming |
| MF | Mesocarp Fiber |
| MF | Mantle Floor |
| MF | Maxx Fusion (Bloog vapor) |