ag·gre·gate adjective, noun, verb, -gat·ed, -gat·ing.

–adjective 1. formed by the conjunction or collection of particulars into a whole mass or sum; total; combined: the aggregate amount of indebtedness.

2. Botany. a. (of a flower) formed of florets collected in a dense cluster but not cohering, as the daisy.

b. (of a fruit) composed of a cluster of carpels belonging to the same flower, as the raspberry.

3. Geology. (of a rock) consisting of a mixture of minerals separable by mechanical means.

–noun 4. a sum, mass, or assemblage of particulars; a total or gross amount: the aggregate of all past experience.

5. a cluster of soil granules not larger than a small crumb.

6. any of various loose, particulate materials, as sand, gravel, or pebbles, added to a cementing agent to make concrete, plaster, etc.

7. Mathematics. set (def. 92).

–verb (used with object) 8. to bring together; collect into one sum, mass, or body.

9. to amount to (the number of): The guns captured will aggregate five or six hundred.

–verb (used without object) 10. to combine and form a collection or mass.

—Idiom11. in the aggregate, taken or considered as a whole: In the aggregate, our losses have been relatively small.

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[Origin: 1375–1425; late ME < L aggregātus (ptp. of aggregāre), equiv. to ag- ag- + greg- (s. of grex flock) + -ātus -ate1]