Not imparted or acquired by teaching; hence, natural, spontaneous.

Philosophy and Theology. Belonging to the ‘habit’ or inward disposition (see habit, n. 8); inherent or latent in the mental constitution.

Consistent with nature; normal, expected. With to. Of a quality, attribute, emotion, etc.: that belongs intrinsically to a person or thing; that…

Internal with regard to human nature or the nature of things; inward, innate. Obsolete. rare.

Of the nature of instinct; operating by or resulting from instinct or innate prompting.

= intestine, adj. 1. rare.

Psychology. Of behaviour, thought, emotion, etc.: apparently originating in unconscious needs or desires, and unaffected by objective reasoning.

Of or pertaining to, involving or depending upon, instinct.

Usually with hyphen. Relating to or designating an innate, deeply rooted, or instinctive feeling, esp. as opposed to rational thought or intellectual…