1. A fundamental, innate behavioral or psychological drive that is not learned but rather inherited and essential to survival or reproduction
The basic instinct to protect one's offspring is present in most animals.
O instinto básico de proteger a prole está presente na maioria dos animais.
2. A primitive or primal urge or impulse, often referring to fundamental human drives such as hunger, survival, or sexual desire
According to Freud, basic instincts drive much of human behavior.
Segundo Freud, os instintos básicos impulsionam grande parte do comportamento humano.