| 1. | U.S. Politics. the dividing of a state, county, etc., into election districts so as to give one political party a majority in many districts while concentrating the voting strength of the other party into as few districts as possible. |
| 2. | U.S. Politics. to subject (a state, county, etc.) to a gerrymander. |

To change the boundaries of legislative districts to favor one party over another. Typically, the dominant party in a state legislature (which is responsible for drawing the boundaries of congressional districts) will try to concentrate the opposing party's strength in as few districts as possible, while giving itself likely majorities in as many districts as possible.