the act of conserving; prevention of injury, decay, waste, or loss; preservation: conservation of wildlife; conservation of human rights.
official supervision of rivers, forests, and other natural resources in order to preserve and protect them through prudent management.
a district, river, forest, etc., under such supervision.
the careful utilization of a natural resource in order to prevent depletion.
the restoration and preservation of works of art.

1350–1400; Middle English conservacioun < Latin conservātiōn- (stem of conservātiō), equivalent to conservāt(us) (past participle of conservāre to conserve; see -ate1) + -iōn- -ion

conservational, adjective
anticonservation, noun, adjective
nonconservation, noun
nonconservational, adjective
proconservation, adjective
self-conservation, noun

1. care, husbandry, protection. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
conservation (ˌkɒnsəˈveɪʃən)
1.  the act or an instance of conserving or keeping from change, loss, injury, etc
2.  a.  protection, preservation, and careful management of natural resources and of the environment
 b.  (as modifier): a conservation area

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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Word Origin & History

late 14c., "preservation of one's health and soundness," from L. conservationem, noun of action from conservare (see conserve). Meaning "preservation of existing conditions" in any sense is from mid-15c. Since late 15c., in ref. to English municipal authorities who had
charge of rivers, sewers, forests, fisheries, etc. Specifically of the environment from 1922.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Science Dictionary
conservation   (kŏn'sûr-vā'shən)  Pronunciation Key 
The protection, preservation, management, or restoration of natural environments and the ecological communities that inhabit them. Conservation is generally held to include the management of human use of natural resources for current public benefit and sustainable social and economic utilization.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
Water conservation is promoted through rainwater harvesting and xeriscaping.
And then there was the peace of mind, the quiet, and the conservation of water.
As means and instruments only, they are necessarily subordinate to the
  conservation of government itself.
It has facilities for conservation of old manuscripts, the rare books and
  special-collections library.
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