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



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“Was” is used for the indicative past tense of “to be,” and “were” is only used for the subjunctive past tense.

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Origin of aggregation

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

OTHER WORDS FROM aggregation

ag·gre·ga·tion·al, adjectivere·ag·gre·ga·tion, nounsub·ag·gre·ga·tion, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

Example sentences from the Web for aggregation

British Dictionary definitions for aggregation

/ (ˌæɡrɪˈɡeɪʃən) /


the act or process of aggregating
ecology dispersion in which the individuals of a species are closer together than if they were randomly dispersed
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

Medical definitions for aggregation

[ ăg′rĭ-gāshən ]


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.