| 1. | a state in the central United States: a part of the Midwest. 11,418,461; 56,400 sq. mi. (146,075 sq. km). Capital: Springfield. Abbreviation: IL (for use with zip code), Ill. |
| 2. | a river flowing SW from NE Illinois to the Mississippi River: connected by a canal with Lake Michigan. 273 mi. (440 km) long. |