Calvin play biographical name Cal·vin \ˈkal-vən\ Definition of Calvin John 1509–1564 originally Jean Cau*vin play \kō-ˈvaⁿ\ Fr. theol. & reformer Calvin biographical name Cal·vin Definition of Calvin Melvin 1911–1997 Am. chem. Seen and Heard What made you want to look up Calvin? Please tell us where you read or heard it (including the quote, if possible).