n.
Pronunciation: ˌ a-gri- ' g ā -sh ə n
Function: noun
Date: 1547
1 : a group, body, or mass composed of many distinct parts or individuals
2 a : the collecting of units or parts into a mass or whole b : the condition of being so collected
– ag · gre · ga · tion · al \ -shn ə l, -sh ə -n ə l \ adjective