What's it mean if you have synesthesia?

Definition: Synesthesia refers to 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. An example would be hearing of a certain sound induces the visualization of a certain color (colored hearing). Synesthesia is a genetically linked trait estimated to affect from 2 to 5 percent of the general population.

Crossed wires: Synesthesia is a condition in which sensory signals "get crossed, " and signals from one sensory system are interpreted as coming from another. For example, some synasthetics will "see" sounds, or "hear" colors.