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[gig-uh-bahyt, jig-] /ˈgɪg əˌbaɪt, ˈdʒɪg-/
noun, Computers.
a measure of storage capacity equal to 2 30 (1024) bytes.
Origin of gigabyte Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for gigabyte


/ˈɡɪɡəˌbaɪt; ˈɡaɪɡəˌbaɪt/
(computing) one thousand and twenty-four megabytes See also giga- (sense 2)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for gigabyte

1982, from giga- + byte.

Online Etymology Dictionary, © 2010 Douglas Harper
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gigabyte in Science
  1. A unit of computer memory or data storage capacity equal to 1,024 megabytes (230 bytes).

  2. One billion bytes. See Note at megabyte.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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gigabyte in Technology

2^30 = 1,073,741,824 bytes = 1024 megabytes.
Roughly the amount of data required to encode a human gene sequence (including all the redundant codons).
See prefix.

The Free On-line Dictionary of Computing, © Denis Howe 2010
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