da·ta·base

[dey-tuh-beys]
noun
1.
a comprehensive collection of related data organized for convenient access, generally in a computer.
Also, da·ta-base, data base.


Origin:
1965–70; data + base1

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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Collins
World English Dictionary
database (ˈdeɪtəˌbeɪs) [Click for IPA pronunciation guide]
 
n
1.  a systematized collection of data that can be accessed immediately and manipulated by a data-processing system for a specific purpose
2.  informal any large store of information: a database of knowledge

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
Databases is always a great word to know.
So is zedonk. Does it mean:
the offspring of a zebra and a donkey.
a gadget; dingus; thingumbob.
American Heritage
Science Dictionary
database   (dā'tə-bās', dāt'ə-)  Pronunciation Key 
A collection of data arranged for ease and speed of search and retrieval by a computer.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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American Heritage
Cultural Dictionary

database definition


A set of data grouped together in one location in (or accessible by) a computer. A computerized database has been likened to an electronic filing cabinet of information arranged for easy access or for a specific purpose.

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Example sentences
Some have even put their lists online as searchable databases or e-mail
  discussion lists.
But putting people's health information in databases and online is going to do
  more than simply reduce redundancies.
Talk of more efficient spies and better databases will worry civil libertarians.
Insurance databases are the largest databases on the planet.
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