1. A unit of information equal to 1000 kilobytes or 10^6 (1,000,000) bytes
   "The photo took up several megabytes of storage";
   - M, MB
    
2. A unit of information equal to 1024 kibibytes or 2^20 (1,048,576) bytes
   "The document was about 5 megabytes in size";
   - mebibyte, M, MB, MiB

Derived forms: megabytes

Type of: computer memory unit

Part of: G, GB, GiB, gibibyte, gig [informal], gigabyte

Encyclopedia: Megabyte