LEARNit Dictionary
founding member
noun
/ˌfaʊndɪŋ ˈmembə(r)/
UK
/ˌfaʊndɪŋ ˈmembər/
US
1
one of the first members of a society, an organization, etc., especially one who helped start it
عضو مؤسس, یکی از بنیانگذاران