IPA: //əˈɡrɛɡeɪʃən//
KK: /æɡrɪˈɡeɪʃən/
A process or result of bringing together different items or parts into a single group or total.
The aggregation of data from various sources helped improve the accuracy of the report.
Aggregation → It is formed from "ad-" (meaning to) and "gregare" (meaning to gather). The word describes the process of gathering things together into a whole or a collection.
Think of 'gathering' things 'together' — 'ad-' means to, and 'gregare' means to gather, which helps you remember that aggregation means bringing things together.