| Acronym | Definition |
|---|
| MTR | Motor |
| MTR | Montreal (Amtrak station code; Montreal, Quebec, Canada) |
| MTR | Meter |
| MTR | Mountaintop Removal (coal mining method) |
| MTR | Mass Transit Railway |
| MTR | Mid-Term Review |
| MTR | Mortar |
| MTR | Muzeul Taranului Roman (Romanian: Romanian Peasant Museum) |
| MTR | Movimiento Teresa Rodriguez (Spanish: Teresa Rodriguez Movement; Argentina) |
| MTR | Media Transfer Rate |
| MTR | Management Traffic Regulator |
| MTR | Mechanized Time Reporting |
| MTR | Mass Text Replacer |
| MTR | Manually Test a Response |
| MTR | Magnetization Transfer Ratio |
| MTR | Meet the Robinsons (animated film) |
| MTR | Museum of Television and Radio |
| MTR | Marginal Tax Rate (How the government taxes us in brackets) |
| MTR | Missile Testing Range (Russia) |
| MTR | Mobile Termination Rate |
| MTR | Ministry of Tourism |
| MTR | Meridian Township Range (various locations) |
| MTR | Materials Test Reactor |
| MTR | Military Training Route |
| MTR | Material Test Report |
| MTR | Maximum Transmission Unit |
| MTR | Motion to Revoke (bail or probation) |
| MTR | Military Technical Revolution |
| MTR | Missile Tracking Radar |
| MTR | Mass Text Replacer (software) |
| MTR | Miller Tabak Roberts Securities, LLC |
| MTR | Medical Transcriptionist |
| MTR | Material Testing Reactor |
| MTR | Maximum Transition Run |
| MTR | Management Team Review (various locations) |
| MTR | Mean Time to Restore |
| MTR | Magnetic Tape Recorder |
| MTR | Mavalli Tiffin Room |
| MTR | Module Test and Repair |
| MTR | Magnetic Tape Recording |
| MTR | Marine Transportation Related (EPA) |
| MTR | Motorized Transportation Regiment (Iraqi Transportation Corps) |
| MTR | Maximum Tolerable Risk |
| MTR | Marubeni Techno Rubber Corporation (Japan) |
| MTR | Mummy: the Resurrection (game) |
| MTR | Montour Railroad Company |
| MTR | Minimum Technical Requirement |
| MTR | Miniature Temperature Recorder |
| MTR | Minimum Technology Requirement |
| MTR | Mandatory Turn-In Repairable |
| MTR | Mobile Traffic Recording (collects all uplink information for a specific operator defined GSM mobile phone) |
| MTR | Master in Translational Research |
| MTR | Months To Roll |
| MTR | Multiple Tablets Regimen (medical treatment) |
| MTR | Military Training for Ratings |
| MTR | Majandustegevuse Registrister |
| MTR | Maritime Training Response (US FEMA) |
| MTR | Multiple Threat Response |
| MTR | Moon Town Records |
| MTR | Multi-User Transmitted Reference |
| MTR | Manufacturer's Test Results (oilfield casing) |
| MTR | Maximun Thermal Retention (Columbia) |
| MTR | Metallurgical Test Report |
| MTR | Merchandise Transfer Report |