1. (noun)instinct, inherent aptitude inborn pattern of behavior often responsive to specific stimuli "the spawning instinct in salmon"; "altruistic instincts in social animals"
2. (adj)instinct(p), replete(p) (followed by `with')deeply filled or permeated "imbued with the spirit of the Reformation"; "words instinct with love"; "it is replete with misery"