Noah Webster's New International Dictionary of the English Language

1. (v. t.) To turn or throw from a basis, foundation, or position; to overset; as, to overturn a carriage or a building.

2. (v. t.) To subvert; to destroy; to overthrow.

3. (v. t.) To overpower; to conquer.

4. (n.) The act off overturning, or the state of being overturned or subverted; overthrow; as, an overturn of parties.