A megabyte is a unit of digital information used to measure file sizes, typically used to describe computer memory and storage capacity. There are a few synonyms for megabyte including "MB," which is an abbreviation often used for digital storage. Another synonym is "meg" which is commonly used in the computer industry to refer to a megabyte of data. A "meg" is also a common abbreviation used in the gaming industry when referring to file sizes. Lastly, "M" is a synonym for megabyte that is also used to express digital storage capacity. Regardless of the synonym used, a megabyte is a crucial unit when it comes to storing digital information.