Definition of: synesthesia

(sin′is·thē′zhə, -zhē·ə) noun Physiol.
1. Transferred sensation; sensation produced at a point different from the point of stimulation.
2. The producing of a subjective response normally associated with one sense by stimulation of another sense, as of a color from hearing a certain sound. Also spelled synaesthesia. [<NL synaesthesia <Gk. synaisthēsis joint perception <synaisthanesthai perceive simultaneously <syn- together + aisthanesthai perceive, feel]
—syn′es·thet′ic (-thet′ik) adjective