n. /up"throh'/ ; v. /up throh"/ , n. , v. , upthrew, upthrown, upthrowing .
n.
1. an upheaval, as of the earth's surface.
2. Geol. an upward displacement of rock on one side of a fault.
v.t.
3. to throw or cast up or upward.
[ 1590-1600; UP- + THROW ]