1. A way of behaving or conducting oneself that is insincere, deceptive, or not genuinely representative of one's true character
He spoke in a false manner to impress his new colleagues.
Ele falava de uma falsa maneira para impressionar seus novos colegas.
2. Artificial or affected conduct; behavior adopted for purposes of deception or pretense
She greeted them with a false manner, hiding her true feelings.
Ela os cumprimentou de uma falsa maneira, escondendo seus verdadeiros sentimentos.