- a throwing up; upheaval
- Geol. that side of a fault which has moved upward relative to the other side
- A throwing upward.
- Geology An upward displacement of rock on one side of a fault.
(third-person singular simple present upthrows, present participle upthrowing, simple past upthrew, past participle upthrown)
- (geology) A fault in which a mass of material has been thrown up from below.
From up- +"Ž throw.