Definition, Usage and a list of synesthesia Examples in common speech and literature. In literature, synesthesia refers to a technique adopted by writers to present ideas, characters or places in such a manner that they appeal to more than one senses like hearing, seeing, smell etc. at a given time.Definition, Usage and a list of synesthesia Examples in common speech and literature. In literature, synesthesia refers to a technique adopted by writers to present ideas, characters or places in s...