| Acronym | Definition |
|---|
| MCLB➣Marine Corps Logistics Base (US DoD) |
| MCLB➣Motorcycle Club Lederbaeren Berlin (German: Leather Bear Motorcycle Club Berlin; Berlin, Germany) |
| MCLB➣Middlesex County Library Board |
| MCLB➣Multi-Column List Box (computing) |
| MCLB➣Multi-Channel Learning Base (UNESCO) |
| MCLB➣Most Children Left Behind |