[uhp-thruhst] 
| 1. | a thrust in an upward direction. |
| 2. | 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. |
| 3. | Geology. an upheaval. |
| 4. | to thrust upward: Frost caused the ground to upthrust. |
| up·thrust (ŭp'thrŭst') n. An upward thrust, especially of part of the earth's crust. tr. & intr.v. up·thrust·ed, up·thrust·ing, up·thrusts To thrust or be thrusted upward. Used especially of the earth's crust. |
