(transitive, now rare) To throw down to the ground, to overturn.
1526, William Tyndale, trans. Bible, John II:And he made a scourge of smale cordes, and drave them all out off the temple, bothe shepe and oxen, and powred doune the changers money, and overthrue their tables.
Jeremy TaylorHis wife overthrew the table.
(transitive) To bring about the downfall of (a government, etc.), especially by force.I hate the current government, but not enough to want to overthrow them.
DrydenWhen the walls of Thebes he overthrew.
ShakespeareGloucester that seeks to overthrow religion.