verb (used with object), dispersed, dispersing.
to drive or send off in various directions; scatter: to disperse a crowd.
to spread widely; disseminate: to disperse knowledge.
to dispel; cause to vanish: The wind dispersed the fog.
Physical Chemistry. to cause (particles) to separate uniformly throughout a solid, liquid, or gas.
Optics. to subject (light) to dispersion.
verb (used without object), dispersed, dispersing.
to separate and move apart in different directions without order or regularity; become scattered: The crowd dispersed.
to be dispelled; be scattered out of sight; vanish: The smoke dispersed into the sky.
Physical Chemistry. noting the dispersed particles in a dispersion.

1350–1400; Middle English dispersen, disparsen (< Middle French disperser) < Latin dispersus (past participle of dispergere), equivalent to di- di-2 + -sper(g)- scatter (stem of -spergere, combining form of spargere to scatter, strew) + -sus past participle suffix

dispersedly [dih-spur-sid-lee] , adverb
disperser, noun
dispersibility, noun
dispersible, adjective
predisperse, verb (used with object), predispersed, predispersing.
redisperse, verb, redispersed, redispersing.
undispersed, adjective
undispersing, adjective
well-dispersed, adjective

1. disperse, disburse ; 2. disperse, dispose.

1. See scatter. 2. sow, broadcast. 7. disappear, evanesce.

1. combine, collect.
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
disperse (dɪˈspɜːs)
1.  to scatter; distribute over a wide area
2.  to dissipate or cause to dissipate
3.  to leave or cause to leave a gathering, often in a random manner
4.  to separate or be separated by dispersion
5.  (tr) to diffuse or spread (news, information, etc)
6.  to separate (particles) throughout a solid, liquid, or gas, as in the formation of a suspension or colloid
7.  of or consisting of the particles in a colloid or suspension: disperse phase
[C14: from Latin dispērsus scattered, from dispergere to scatter widely, from di-² + spargere to strew]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Word Origin & History

mid-15c., from M.Fr. disperser "scatter," from L. dispersus, pp. of dispergere "to scatter," from dis- "apart, in every direction" + spargere "to scatter" (see sparse). The L. word is glossed in O.E. by tostregdan. Related: Dispersed; dispersing.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

disperse dis·perse (dĭ-spûrs')
v. dis·persed, dis·pers·ing, dis·pers·es

  1. To cause to separate and move in different directions; scatter.

  2. To cause to vanish or disappear.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences
Protective padding, clothing, and helmets disperse the impact of falls.
Campus officers called in the Lewiston police for assistance, but some partiers
  still refused to disperse.
Police had to disperse them.
Just before serving, pile the potatoes into a bowl and season with salt,
  tossing to disperse the seasoning.
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