| Acronym | Definition |
|---|
| MK | Market |
| MK | Mark |
| MK | Michael Kors (designing) |
| MK | Magic Kingdom (Disney) |
| MK | Mary Kay (cosmetics company) |
| MK | Mortal Kombat |
| MK | Mario Kart (video game) |
| MK | Milton Keynes |
| MK | Mankind |
| MK | Maintenance Kit (various companies) |
| MK | Monkey King (film) |
| MK | Mushroom Kingdom (Mario video games) |
| MK | Mark Knopfler (singer/songwriter) |
| MK | Mein Kampf (German: My Struggle) |
| MK | Master Key |
| MK | Muthuvel Karunanidhi (Indian politician) |
| MK | Mahkamah Konstitusi (Indonesia) |
| MK | Umkhonto We Sizwe (Afrikaans-Spear of the Nation, South African Black Underground Movement) |
| MK | Umkhonto We Sizwe (Spear of the Nation) |
| MK | Mechanical Keyboards, Inc. (Fairview, TN) |
| MK | Member of Knesset (Israeli Parliament) |
| MK | Macedonia (former Yugoslav Republic of) (ISO Country Identifier) |
| MK | Air Mauritius (IATA airline code) |
| MK | Mountain King (gaming) |
| MK | Morrison Knudsen |
| MK | Mong Kok (Hong Kong) |
| MK | Michelle Kwan (figure skater) |
| MK | Marvel Knights (comic) |
| MK | Midkine |
| MK | Missionary Kid |
| MK | Mercy Killing |
| MK | Mebyon Kernow (Cornish Nationalist Party) |
| MK | Mount Kilimanjaro (Tanzania, Africa) |
| MK | Menkes Disease |
| MK | Magyar Köztársaság (Republic of Hungary) |
| MK | Machinery Technician (US Coast Guard Rating) |
| MK | Maschinenkanone (German: machine cannon) |
| MK | Marburger Konvent (federation German fraternities) |
| MK | Montreal Kosher |
| MK | Manufacturing Knowledge |
| MK | Manual Keying |
| MK | Mystic Kingdom (online gaming) |
| MK | Metre Kelvin (thermal conductivity watt per metre Kelvin) |
| MK | Multy Kontact (UK plug and socket manufacturer) |
| MK | M-M-M-M-Monster Kill (Unreal Tournament) |
| MK | Monk Killers (gaming clan) |