Aggregate  —n. 1 sum total, amount assembled. 2 crushed stone etc. Used in making concrete. 3 rock formed of a mass of different particles or minerals. —adj. Combined, collective, total. —v. (-ting) 1 collect, combine into one mass. 2 colloq. Amount to. 3 unite.  in the aggregate as a whole.  aggregation n. Aggregative adj. [latin grex greg- flock]