[ noun uhp-throh; verb uhp-throh ]
/ noun ˈʌpˌθroʊ; verb ʌpˈθroʊ /


an upheaval, as of the earth's surface.
Geology. an upward displacement of rock on one side of a fault.

verb (used with object), up·threw, up·thrown, up·throw·ing.

to throw or cast up or upward.

Origin of upthrow

First recorded in 1590–1600; up- + throw
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for upthrow

British Dictionary definitions for upthrow


/ (ˈʌpˌθrəʊ) /


geology the upward movement of rocks on one side of a fault plane relative to rocks on the other side
rare an upward thrust or throw; upheaval
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012