1. To display a lack of interest, concern, or enthusiasm about something or someone
He showed disinterest in the job offer by not attending the interview.
Ele demonstrou desinteresse na oferta de emprego não comparecendo à entrevista.
2. To appear indifferent or unimpressed
She showed disinterest when her friends talked about the party.
Ela mostrou desinteresse quando seus amigos falaram sobre a festa.