Definition of "mental representation" [mental representation]

• A presentation to the mind in the form of an idea or image (noun)

WordNet. Princeton University. 2010.

• "Second, that this reaction -- let us name it apperception of the stimulus -- took place slowly and imperfectly, owing to the state of sleep, so that the reaction was, to begin with, only remotely relevant to the stimulus, but improved in relevancy with successive evocations, until the mental representation closely approximated the character of the stimulus."