1. A speech or verbal presentation delivered without a prepared text or memorized content, spoken spontaneously
The president gave an unscripted speech at the charity event, speaking from the heart.
O presidente fez um discurso improvisado no evento beneficente, falando do coração.
2. A spontaneous oral delivery, often more natural and conversational than formal prepared remarks
Her unscripted speech was more engaging than the formal presentation that followed.
Seu discurso improvisado foi mais envolvente do que a apresentação formal que se seguiu.