I. transitive verb (upthrew; ~n; -throwing) Date: 14th century to throw or thrust upward, II. noun Date: 1807 an upward displacement (as of a rock stratum) ; upheaval , upthrust
UPTHROW
Meaning of UPTHROW in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012