megabyte

n. (Computers) one million bytes; unit of computer data storage capacity equal to 1,048,576 bytes (also mega byte)

A megabyte or Mbyte is a unit of information or computer storage equal to either 106 (1,000,000) bytes or 220 (1,048,576) bytes, depending on context. In rare cases, it is used to mean 1000×1024 (1,024,000) bytes. It is commonly abbreviated as Mbyte or MB (not to be confused with Mb, which is used for the megabit). The term megabyte was coined in 1970.
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Noun
1. a unit of information equal to one million (1,048,576) bytes
(synonym) MB
(hypernym) computer memory unit
(part-holonym) gigabyte, G, GB
(part-meronym) kilobyte, K, KB

n. MegaByte, MB, unit of storage, one million bytes (Computers)

n. megabyte, one million bytes (Computers)