Meaning of upspring

up•spring

Pronunciation: (v.up-spring',n.up'spring"), [key]
— v., n. -sprang -sprung, -sprung, -spring•ing,
—v.i.
  1. to spring up.
  2. to come into being or existence; arise: Prosperity began to upspring after the war.
—n.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.