To start or spring up suddenly.n. One who or that which starts or springs up suddenly; specifically, a person who suddenly rises from a humble position to wealth, power, or consequence; a parvenu.n. One who assumes a lofty or arrogant tone.n. A puddle made by the hoofs of horses in clayey ground. Halliwell. The meadow-saffron, Colchicum autumnale, whose flowers spring up suddenly without leaves.Starting up suddenly; quickly rising.Suddenly raised to prominence or consequence; parvenu: as, “a race of upstart creatures,”Characteristic of a parvenu; new and pretentious.