megabyte n 1: a unit of information equal to 1000 kilobytes or 10^6 (1,000,000) bytes [syn: {megabyte}, {M}, {MB}] 2: a unit of information equal to 1024 kibibytes or 2^20 (1,048,576) bytes [syn: {megabyte}, {mebibyte}, {M}, {MB}, {MiB}]
megabyte meg <unit> ({MB}, colloquially "meg") 2^20 = 1,048,576 {bytes} = 1024 {kilobytes}. 1024 megabytes are one {gigabyte}. The text of a six hundred page paperback book would require about a megabyte of {ASCII} storage. See {prefix}. (1997-03-26)