| Acronym | Definition |
|---|
| MACH | Machine |
| MACH | Machine Tool (course) |
| MACH | Maternal and Child Health (various locations) |
| MACH | Machinist |
| MACH | Multifaced Asymmetrical Configuration Hyper-Pixel |
| MACH | Motion Accelerating Hyper-Pixel |
| MACH | Multiple Advanced Computers for Hypersonics |
| MACH | Modified Air Combat Heroes (gaming) |
| MACH | Master Agility Champion (dog agility title) |
| MACH | Martin Army Community Hospital (Fort Benning, GA, USA) |
| MACH | Multilayer Actuator Head |
| MACH | Moncrief Army Community Hospital (Eastover, SC; US DoD) |
| MACH | Machinable Letter (US Postal Service) |
| MACH | Mobile Access Command Headquarters (cellular emergency services) |
| MACH | Mobile Air Cargo Handling |
| MACH | Management of Aquatic Resources through Community Husbandry Project (Bangladesh) |
| MACH | Microsoft Academy for College Hires Program |
| MACH | Model of Atmospheric Chemical Hazards |
| MACH | Multi-Application Control by Honeywell (X-38 aircraft) |
| MACH | Modular, Adaptive, Computer, Hardware |