1. to make a formal or public statement about one's position, opinion, or intentions
He declared himself in favor of the new policy.
Ele se declarou a favor da nova política.
2. to reveal one's true identity, allegiance, or feelings
She finally declared herself as a candidate for the election.
Ela finalmente se declarou como candidata para a eleição.
3. to openly express romantic feelings toward someone
He declared himself in love with her after years of friendship.
Ele se declarou apaixonado por ela após anos de amizade.