noun
- a thrust in an upward direction.
- a sudden and forceful upward movement, as of a nation’s economy or the stock market: Market observers are hoping the upthrust can be sustained.
- Geology. an upheaval.
verb (used without object)
- to thrust upward: Frost caused the ground to upthrust.
noun
- an upward push or thrust
- geology a violent upheaval of the earth’s surface