What is the definition of mental images?

in my English language class my teacher told me that it means "an image that requires someone to draw on their contextual knowledge to understand it" but i am not entirely sure..hope this helps :)

Of, or referring to, the mind.

Mental time travel usually means imagining another time, past or future.

You would use a mental image if you were daydreaming or if you were experiencing something that your mind would not accept (Something disturbing, unbelievable, etc.). You could also use a mental...

The English phrase 'mental lexicon' means a language user's knowledge of words