1. mb, mbit, megabit

a unit of information equal to 1000 kilobits or 10^6 (1,000,000) bits

• mbit
• megabit

2. m, mb, megabyte

a unit of information equal to 1000 kilobytes or 10^6 (1,000,000) bytes

• m
• megabyte

3. m, mb, mebibyte, megabyte, mib

a unit of information equal to 1024 kibibytes or 2^20 (1,048,576) bytes

• m
• mebibyte
• megabyte
• mib

4. bachelor of medicine, mb

(a British degree) a bachelor's degree in medicine

• bachelor of medicine