1. to handle a situation with tact, sensitivity, and discretion; to communicate in a way that avoids offense or conflict while achieving one's goals
She decided to be diplomatic when discussing the budget cuts with her team.
Ela decidiu ser diplomática ao discutir os cortes orçamentários com sua equipe.
2. to express oneself carefully and thoughtfully to maintain good relations
He tried to be diplomatic in his criticism of the proposal.
Ele tentou ser diplomático em sua crítica da proposta.