socio, -a
masculine or feminine noun
1. partner(commerce)
hacerse socio, -a de una empresa -> to become a partner in a company
socio, -a capitalista o comanditario -> sleeping partner (British), silent partner (United States)
socio, -a comercial -> trading partner
socio, -a fundador -> founding partner
socio, -a mayoritario -> majority shareholder
2. member (miembro)
hacerse socio, -a de un club -> to join a club
socio, -a honorario o de honor -> honorary member
socio, -a de número -> full member
socio, -a vitalicio -> life member
3. mate (informal) (amigo) (British), buddy (United States)