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An aggregate is an archaic word for an infinite set, as used by Georg Cantor.

It is used in current parlance to mean a general accumulation of objects, but the concept is vague.

Linguistic Note

The word aggregate was used by Philip E.B. Jourdain when translating Georg Cantor's use of the word Menge from the German.

It has since been superseded by the more compact and streamlined set.