'megabyte' definitions:

Definition of 'megabyte'

(from WordNet)
noun
A unit of information equal to 1000 kilobytes or 10^6 (1,000,000) bytes [syn: megabyte, M, MB]
noun
A unit of information equal to 1024 kibibytes or 2^20 (1,048,576) bytes [syn: megabyte, mebibyte, M, MB, MiB]