Nonesuch is a noun that refers to a person or thing without equal.
Our word of the day’s origin is in Middle English and it basically means ‘no such person or things.’ You could think of a nonesuch as an ideal, a model of a particular thing’s perfection that does not actually exist.
Tammy is the nonesuch of gymnasts. Her style and execution are unlike any I’ve witnessed. I’ve never seen anybody come that close to perfection.