gig·a·byte

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

Origin:
giga- + byte

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Based on the Random House Dictionary, © Random House, Inc. 2013.
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Collins
World English Dictionary
gigabyte (ˈɡɪɡəˌbaɪt, ˈɡaɪɡəˌbaɪt) [Click for IPA pronunciation guide]
 
n
computing See also giga- one thousand and twenty-four megabytes

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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00:10
Gigabyte is always a great word to know.
So is interrobang. Does it mean:
an extraordinary or unusual thing, person, or event; an exceptional example or instance.
a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.
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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FOLDOC
Computing Dictionary

gigabyte definition

unit
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.
(1995-09-29)

The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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Example sentences
For comparison, the human genome is less than a gigabyte in size.
These convenient storage devices will hold up to one gigabyte of files, and that's a lot of holiday photos and mp3 files.
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