[gig-uh-bahyt, jig-]
noun Computers.
a measure of storage capacity equal to 2 30 (1024) bytes.

giga- + byte Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
gigabyte (ˈɡɪɡəˌbaɪt, ˈɡaɪɡəˌbaɪt)
computing See also giga- one thousand and twenty-four megabytes

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Science Dictionary
gigabyte   (gĭg'ə-bīt')  Pronunciation Key 
  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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