- The pure, highly concentrated essence of a thing.
- The purest or most typical instance: the quintessence of evil.
- In ancient and medieval philosophy, the fifth and highest essence after the four elements of earth, air, fire, and water, thought to be the substance of the heavenly bodies and latent in all things.
[Middle English, from Old French quinte essence, fifth essence, from Medieval Latin quīnta essentia (translation of Greek pemptē ousiā) : Latin quīnta, feminine of quīntus, fifth + Latin essentia, essence; see essence.]





