early 15c., from Middle French agrégation or directly from Medieval Latin aggregationem (nominative aggregatio), noun of action from past participle stem of Latin aggregare (see aggregate (adj.)).
aggregation ag·gre·ga·tion (āg'rĭ-gā'shən)
n.
A massing together or clustering of independent but similar units, such as particles, parts, or bodies.
programming
A composition technique for building a new object from one or more existing objects that support some or all of the new object's required interfaces.
(1996-01-07)