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dissipation

[dis-uh-pey-shuh n] /ˌdɪs əˈpeɪ ʃən/
noun
1.
the act of dissipating.
2.
the state of being dissipated; dispersion; disintegration.
3.
a wasting by misuse:
the dissipation of a fortune.
4.
mental distraction; amusement; diversion.
5.
dissolute way of living, especially excessive drinking of liquor; intemperance.
6.
Physics, Mechanics. a process in which energy is used or lost without accomplishing useful work, as friction causing loss of mechanical energy.
Origin of dissipation
1535-1545
1535-45; < Latin dissipātiōn- (stem of dissipātiō), equivalent to dissipāt(us) (see dissipate) + -iōn- -ion
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for dissipation

dissipation

/ˌdɪsɪˈpeɪʃən/
noun
1.
the act of dissipating or condition of being dissipated
2.
unrestrained indulgence in physical pleasures, esp alcohol
3.
excessive expenditure; wastefulness
4.
amusement; diversion
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 dissipation
n.

early 15c., "act of scattering," from Latin dissipationem (nominative dissipatio), noun of action from past participle stem of dissipare (see dissipate). Meaning "intemperate mode of living" is from 1784.

Online Etymology Dictionary, © 2010 Douglas Harper
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dissipation in Science
dissipation
  (dĭs'ə-pā'shən)   
The loss of energy from a physical system, most often in the form of heat.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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