megabyte (unit, data) (MB, colloquially "meg") A Unit of data equal to one million bytes but see binary prefix for other definitions. A megabyte is 1000^2 bytes or 1000 kilobytes.
The text of a six hundred page paperback book stored as ASCII characters contains about one megabyte of data. The complete King James bible is 5.2 megabytes. 1000 megabytes are one gigabyte. See prefix. Last updated: 2013-11-04
