1. a way of behaving or conducting oneself that shows lack of interest, concern, or sympathy
He spoke about the accident in an indifferent manner, as if nothing had happened.
Ele falou sobre o acidente de um modo indiferente, como se nada tivesse acontecido.
2. a detached or apathetic approach to something
She treated the serious matter in an indifferent manner that surprised everyone.
Ela tratou o assunto sério de uma maneira indiferente que surpreendeu a todos.