aggregation

noun

ag·​gre·​ga·​tion ˌa-gri-ˈgā-shən 

1

: a group, body, or mass composed of many distinct parts or individuals

A galaxy is an aggregation of stars and gas.

2

a

: the collecting of units or parts into a mass or whole

b

: the condition of being so collected

aggregational

ˌa-gri-ˈgā-sh(ə-)nəl 

adjective

Examples of aggregation in a Sentence

Recent Examples on the Web

The increases — including the $5-per-month escalation relating to Thursday’s wildfire spending decision — also apply to customers enrolled in San Diego Community Power and the Clean Energy Alliance, the two community choice aggregation, or CCA, programs in the region. —Rob Nikolewski, San Diego Union-Tribune, 15 Jan. 2026

These flights help monitor changes in animal populations, identify various species, recognize trends using standardized data, and monitor aggregations. —Rick Sobey, Boston Herald, 13 Jan. 2026

In an increasingly competitive streaming market, platforms are seeing the benefits of aggregation, creating cooperative business models that look a lot like old school cable bundling. —Scott Roxborough, HollywoodReporter, 13 Jan. 2026

The researchers report that the material blocks nearly 100 percent of UVA rays through a molecular arrangement known as the J-aggregation effect. —Neetika Walter, Interesting Engineering, 13 Jan. 2026

Word History

Etymology

Middle English aggreciacioun "process of adding numbers, gathering of pus or humors," borrowed from Late Latin aggregātiōn-, aggregātiō "gathering together," from Latin aggregāre "to cause to flock together, aggregate entry 2" + -tiōn-, -tiō, suffix of action nouns

First Known Use

1547, in the meaning defined at sense 1

Phrases Containing aggregation

• sign of aggregation

Rhymes for aggregation

• abdication
• aberration
• abjuration
• abnegation
• abrogation
• acceptation
• acclamation
• acclimation
• accusation
• activation
• actuation
• acylation

Kids Definition

aggregation

noun

ag·​gre·​ga·​tion ˌag-ri-ˈgā-shən 

1

: the collecting of units or parts into a mass or whole

2

: a group, body, or mass composed of many distinct parts

Legal Definition

aggregation

noun

ag·​gre·​ga·​tion ˌa-grə-ˈgā-shən 

1

: the collecting of individual units (as damages) into a whole

2

: a collection of separate parts that is unpatentable because no integrated mechanism or new and useful result is produced compare combination, equivalent