overturn

American Heritage® Dictionary of the English Language, Fourth Edition

1. v. To cause to turn over or capsize; upset.
2. v. To cause the ruin or destruction of; overthrow. See Synonyms at overthrow.
3. v. Law To invalidate or reverse (a decision) by legal means: "his continuing legal battles to overturn a draft-evasion conviction” ( Robert Lipsyte).
4. v. To turn over or capsize.
5. n. The act or process of overturning.
6. n. The state of having been overturned.

Century Dictionary and Cyclopedia

1. To overset; upset; overthrow.
2. To subvert; ruin; destroy; bring to naught.
3. To overpower; conquer; overwhelm.
4. Synonyms Overturn, Overthrow, Subvert, Invert, upset, throw down, beat down, prostrate. The first three of the italicized words indicate violence and destructiveness. Invert is rarely used where the action is not careful and with a purpose: as, to invert a goblet to prevent its being filled. That which is overturned or overthrown is brought down from a standing or erect position to lie prostrate. Overthrow indicates more violence or energy than overturn, as throw is stronger than turn. That which is subverted is reached to the very bottom and goes to wreck in the turning: as, to subvert the very foundations of justice. To invert is primarily to turn upside down, but it may be used figuratively, of things not material, for turning wrong side before or reversing: as, to invert the order of a sentence. See defeat, v. t., and demolish.
5. To be overturned; capsize: as, a boat that is likely to overturn.
6. n. The state of being overturned or subverted; the act of overturning; overthrow.
7. n. Refrain; burden.

Wiktionary

1. v. To turn over, capsize or upset (something)
2. v. To overthrow or destroy something
3. v. law To reverse a decision; to overrule or rescind

GNU Webster's 1913

1. v. To turn or throw from a basis, foundation, or position; to overset.
2. v. To subvert; to destroy; to overthrow.
3. v. To overpower; to conquer.
4. n. The act off overturning, or the state of being overturned or subverted; overthrow.

WordNet 3.0

1. v. cause the downfall of; of rulers
2. v. cause to overturn from an upright or normal position
3. n. the act of upsetting something
4. n. an improbable and unexpected victory
5. v. rule against
6. v. cancel officially
7. v. change radically
8. v. turn from an upright or normal position