Vitruvius play biographical name Vi·tru·vi·us \və-ˈtrü-vē-əs\ Definition of Vitruvius fl 1st cent. b.c. Marcus Vitruvius Pollio Rom. architect & engineer Learn More about vitruvius Britannica.com: Encyclopedia article about "Vitruvius" Seen and Heard What made you want to look up Vitruvius? Please tell us where you read or heard it (including the quote, if possible).