aggregation

[ag-ri-gey-shuhn]
noun
1.
a group or mass of distinct or varied things, persons, etc.: an aggregation of complainants.
2.
collection into an unorganized whole.
3.
the state of being so collected.
4.
Biology, Ecology. a group of organisms of the same or different species living closely together but less integrated than a society.

Origin:
1540–50; < Medieval Latin aggregātiōn- (stem of aggregātiō); see aggregate, -ion

aggregational, adjective
reaggregation, noun
subaggregation, noun
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World English Dictionary
aggregation (ˌæɡrɪˈɡeɪʃən)
 
n
1.  the act or process of aggregating
2.  ecology dispersion in which the individuals of a species are closer together than if they were randomly dispersed

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

aggregation ag·gre·ga·tion (āg'rĭ-gā'shən)
n.
A massing together or clustering of independent but similar units, such as particles, parts, or bodies.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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FOLDOC
Computing Dictionary

aggregation definition

programming
A composition technique for building a new object from one or more existing objects that support some or all of the new object's required interfaces.
(1996-01-07)

The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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Example sentences
The winning aggregation employed much open play that bewildered the visitors.
Such an initial aggregation need not choose pure democracy for its ongoing
  aggregation device.
The animals often return to the same aggregation sites after feeding.
The true consumer e-commerce revolution centers around aggregation and
  collaboration.
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