1. A fundamental, innate biological or psychological drive that motivates behavior without conscious thought, such as the drive for survival, reproduction, or self-preservation
Hunger is one of the most fundamental basic instincts in humans and animals.
A fome é um dos instintos básicos mais fundamentais em humanos e animais.
2. A natural, unlearned tendency or impulse that guides behavior or decision-making
She relied on her basic instinct to trust him despite the warnings.
Ela confiou em seu instinto básico para confiar nele apesar dos avisos.