Definition of instinctual adjective from the Oxford Advanced Learner's Dictionary

 

instinctual

 adjective
adjective
BrE BrE//ɪnˈstɪŋktʃuəl//
 
; NAmE NAmE//ɪnˈstɪŋktʃuəl//
 
(psychology)
 
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based on natural instinct; not learned
See the Oxford Advanced American Dictionary entry: instinctual