| Acronym | Meaning |
| MAT | M1 Abrams Tank |
| MAT | Maintenance Augmentation Team |
| MAT | Maintenance Tape |
| MAT | Major Area Team |
| MAT | Management Assistance Team |
| MAT | Manual Angle Tracking |
| MAT | Map Administration Tool |
| MAT | Material/Materiel |
| MAT | Material/Mine Assembly Team |
| MAT | Materials Management |
| MAT | Medium Anti-Tank (rocket team) |
| MAT | Military Air Traffic |
| MAT | Minimum Activity Tour (US Navy) |
| MAT | Misrep (Mission Report) Analysis Tool (US Air Force) |
| MAT | Mission Applications Tool |
| MAT | Mission Area Team |
| MAT | Mobile Advisory Team |
| MAT | Mobile Aeronautical Telemetry |
| MAT | Mobilization Assistance Team |
| MAT | Module Acceptance Test |
| MAT | Monitoring, Analysis and Testing |
| MAT | Movement Area Training |
| MAT | Multi Axis Trainer |
| MAT | Municipal Accommodation Tax (Canada) |