1. Related to or having total visual recall of anything previously seen; characterized by exact visualization of events or of objects previously seen.
2. In psychiatry, pertaining to or characterized by clear visualization (even by a voluntary act) of objects previously seen.

Eidetic images (also known as primary memory images) are clearer and richer in detail than the usual memory images and are also more intense and of better quality. Except that the subject recognizes the eidetic image as a memory experience, the phenomenon is analogous to a hallucination. Visual eidetic imagery is more common than auditory.

Eidetic people can readily reproduce in their minds, with great accuracy and detail, what they have seen recently or from some past event. Eidetic imagery is considered by some to be one of the most important elements for the mastery of chess.