{s} pertaining to instinct; prompted by instinct, based on innate behavioral patterns, natural, inborn; impulsive, spontaneous; intuitive
Of or pertaining to instinct; derived from, or prompted by, instinct; of the nature of instinct; determined by natural impulse or propensity; acting or produced without reasoning, deliberation, instruction, or experience; spontaneous
unthinking; prompted by (or as if by) instinct; "a cat's natural aversion to water"; "offering to help was as instinctive as breathing"
An instinctive feeling, idea, or action is one that you have or do without thinking or reasoning. It's an absolutely instinctive reaction -- if a child falls you pick it up = natural + instinctively in·stinc·tive·ly Jane instinctively knew all was not well with her 10-month old son. based on instinct and not involving thought