(ˈ)inz|tiŋ(k)tiv, ənˈst-, -)tēv also -)təv adjective
Etymology: instinct (I) + -ive
: of, relating to, or constituting instinct : derived from or prompted by instinct : determined by natural impulse or propensity : unlearned , unreasoned
an instinctive dread of mice
instinctive behavior
Synonyms: see spontaneous