1. A person who has been a member of an organization, group, or institution for a considerable period and has achieved recognized status within it
As an established member of the club, she was asked to mentor new recruits.
Como membro estabelecido do clube, ela foi convidada a orientar os novos recrutados.
2. Someone with proven commitment, credibility, and acceptance within a community or professional circle
He became an established member of the scientific community after publishing several groundbreaking papers.
Ele se tornou um membro estabelecido da comunidade científica após publicar vários artigos inovadores.