founder member
noun /ˌfaʊndə ˈmembə(r)/
/ˌfaʊndər ˈmembər/
(British English) (North American English charter member, founding member)
- one of the first members of a society, an organization, etc., especially one who helped start it
(社团、组织等的)创办人之一,发起人之一,创建人之一