1. (adjective) approved, authorized, or confirmed by someone in authority
The official announcement will be made tomorrow.
O anúncio oficial será feito amanhã.
2. (adjective) relating to an office or position of authority
She performed her official duties with great care.
Ela desempenhou suas funções oficiais com muito cuidado.
3. (noun) a person holding a position of authority in an organization
The official checked our documents at the border.
O oficial verificou nossos documentos na fronteira.