External; public; suitable to be imparted to the public; hence, capable of being readily or fully comprehended; -- opposed to esoteric, or secret.

(Greek exo, meaning "outside") The opposite of esoteric, or hidden. Popular religious teachings given openly and publicly.

suitable for the general public; "writings of an exoteric nature"

Exoteric knowledge is knowledge that is publicly available and pertains solely to what is thought to be "reality" considered manifest "outside" oneself. There is one pervasive meme in the body of esoteric knowledge nowadays readily accessible to the interested. It insists that the perceived outside reality is merely an internal fabrication of the observer and has no existence or substance outside the imagination of the observer.