Pronunciation: (sal-tā'shun),[key] —n. 1. a dancing, hopping, or leaping movement.
2. an abrupt movement or transition.
3. Geol.intermittent, leaping movement of particles of sand or gravel, as from the force of wind or running water.
4. Biol. a. a sudden discontinuity in a line of descent.
b. a mutation.