| Noun | 1. | Mb - a unit of information equal to 1000 kilobits or 10^6 (1,000,000) bits computer memory unit - a unit for measuring computer memory |
| 2. | MB - a unit of information equal to 1000 kilobytes or 10^6 (1,000,000) bytes computer memory unit - a unit for measuring computer memory | |
| 3. | MB - a unit of information equal to 1024 kibibytes or 2^20 (1,048,576) bytescomputer memory unit - a unit for measuring computer memory | |
| 4. | MB - (a British degree) a bachelor's degree in medicinebachelor's degree, baccalaureate - an academic degree conferred on someone who has successfully completed undergraduate studies Britain, Great Britain, U.K., UK, United Kingdom, United Kingdom of Great Britain and Northern Ireland - a monarchy in northwestern Europe occupying most of the British Isles; divided into England and Scotland and Wales and Northern Ireland; `Great Britain' is often used loosely to refer to the United Kingdom |