External; open; suitable for or communicated to the general public; popular: originally applied to the public teachings of Aristotle and other ancient philosophers, and sometimes used in a more special sense as opposed to fancied or real esoteric doctrines, See esoteric.Pertaining to the outside; holding an external relation; publicly instructed.In embryology, ectoblastic. See extract under esoteric.n. One admitted only to exoteric instruction; one of the uninitiated.