what is a simple definition for synaesthesia

this is the hardest superhero power to understand. someone please explain the simplest way to understand this superpower

@michaelkai1: You see sounds, taste colors, things like that. It's an actual medical condition, not just a comic thing. Literally defined as "

synesthesia |ˌsinəsˈθē zh ə| ( Brit. synaesthesia)

noun Physiology & Psychology

the production of a sense impression relating to one sense or part of the body by stimulation of another sense or part of the body.

• the poetic description of a sense impression in terms of another sense, as in “a loud perfume” or “an icy voice.”