IPA: /əˌfɪliˈeɪʃən/
KK: /əˌfɪliˈeɪʃən/
A connection or relationship between a person or group and a larger organization or group.
Her affiliation with the university helped her gain access to valuable resources.
Affiliation is formed from "ad-" (meaning to, towards) and "filiare" (meaning to make a son or to adopt). The word describes the act of being connected or associated with a group or organization, as if one is being 'adopted' into it.
Think of 'ad-' meaning 'towards' and 'filiare' meaning 'to make a son' — this helps you remember that 'affiliation' means being connected or associated with a group, almost like being adopted into it.