overthrowv. t.1. To throw over; to overturn; to upset; to turn upside down.()His wife overthrew the table. (Jer. Taylor.)2. To cause to fall or to fail; to subvert; to defeat; to make a ruin of; to destroy; as, to overthrow a government.()When the walls of Thebes he overthrew. (Dryden.)[Gloucester] that seeks to overthrow religion. (Shak.)3. (Baseball) To throw (a baseball) beyond; to throw too high and too far; to overshoot{1}; as, the shortstop overthrew the first baseman.()()n.1. The act of overthrowing; the state of being overthrown; ruin.()Your sudden overthrow much rueth me. (Spenser.)()2. (Baseball) The act of throwing a ball too high, as over a player's head.()