| maître d'hôtel | maître d'hôtel |
| Maó | Mahon |
| Mažeikiai | Mažeikiai |
| Mbabane | Mbabane |
| Mbacke | Mbacké Department |
| Mbala | Mbala |
| MBDA Sea Skua | Sea Skua |
| Mbeya | Mbeya Region |
| Mbombela Stadium | Mbombela Stadium |
| Mbps (megabits por segundo) | Mbpsend |
| MBTI | Myers-Briggs Type Indicator |
| Mbuji-Mayi | Mbuji-Mayi |
| MC | MC |
| McAfee | McAfee |
| McDonaldização | McDonaldization |
| McDonnell Aircraft Corporation | McDonnell Aircraft |
| McDonnell Douglas | McDonnell Douglas |
| McFly | McFly |
| McGuire AFB | McGuire Air Force Base |
| Mchinji | Mchinji District |
| Mcjob | McJob |
| MD | MD |
| Mdina | Mdina |
| me | me |
| Me Against the Music | Me Against the Music |
| Me First And The Gimme Gimmes | Me First and the Gimme Gimmes |
| Mea Shearim | Meah Shearim |
| meada | hank |
| meadasmonico | skeinend |
| Mean Girls | Mean Girls |
| Mean Streets | Mean Streets |
| meandrar | meander |
| meandroonico | unit |
| Meat Is Murder | Meat Is Murder |
| MebiByte | Byte |
| Meca | Mecca |
| Mecachrome | Mecachrome |
| mecanicamente | mechanically |
| mecanismo | apparatus |
| Mecanismo de Desenvolvimento Limpo | Clean Development Mechanism |
| Mecanismo de Frank-Starling | Frank-Starling law of the heart |
| Mecanismo de Higgs | Higgs mechanism |
| Mecanismo de quatro barras | Four bar linkage |
| mecanismo de relógio | clockwork |
| mecanismonico | unit |
| mecanizar | mechanize |
| mecanizarnico | to mechanize |
| mecanização | mechanization |
| Mecca-Cola | Mecca-Cola |
| Mecenas | Gaius Maecenas |
| mecha | match |
| Mechelen | Malines |
| Meckenbeuren | Meckenbeuren |
| Mecklemburgo-Pomerânia Ocidental | Mecklenburg-Vorpommern |
| Mecklenburg-Schwerin | Mecklenburg-Schwerin |
| Mecklenburg-Strelitz | Mecklenburg-Strelitz |
| Mecklenburgische Staatskapelle | Mecklenburgische Staatskapelle |
| Meconopsis | Meconopsis |
| mecânica | mechanic |
| Mecânica celeste | Celestial mechanics |
| Mecânica clássica | Classical mechanics |
| mecânica de fluidos | fluidics |
| mecânica de precisão | precision engineering |
| Mecânica dos fluidos | Fluid mechanics |
| Mecânica estatística | Statistical mechanics |
| Mecânica quântica | Quantum mechanics |
| mecânicanico | mechanics unit |
| mecânico | automatic |
| mecâniconico | mechanic |
| mecânicos | mechanics |
| meda | stack |
| meda clínico | haystackd |
| meda de feno | haycock |
