Etymology

Noun

1. A mass, assemblage, or sum of particulars; something consisting of elements but considered as a whole.
2. A mass formed by the union of homogeneous particles; – in distinction from a compound, formed by the union of heterogeneous particles.
3. The full chromatic scale of twelve equal tempered pitches.
4. Crushed stone, crushed slag or water-worn gravel used for surfacing a built-up roof system.
5. Solid particles of low aspect ratio added to a composite material, as distinguished from the matrix and any fibers or reinforcements, especially the gravel and sand added to concrete. (technical)

Adjective

1. Formed by a collection of particulars into a whole mass or sum; collective; combined; added up
2. consisting or formed of smaller objects or parts.
3. Formed into clusters or groups of lobules; as, aggregate glands.
4. Composed of several florets within a common involucre, as in the daisy; or of several carpels formed from one flower, as in the raspberry.
5. Having the several component parts adherent to each other only to such a degree as to be separable by mechanical means.
6. United into a common organized mass; said of certain compound animals.

Verb

1. To bring together; to collect into a mass or sum. The aggregated soil.
2. To add or unite, as, a person, to an association.
3. To amount in the aggregate to; as, ten loads, aggregating five hundred bushels.