- a state in the northwestern United States. 83,557 sq. mi. (216,415 sq. km). Capital: Boise. Abbreviations: ID (for use with zip code), Id., Ida.
- a variety of potato, a russet Burbank grown in Idaho.
- a state of the northwestern US: consists chiefly of ranges of the Rocky Mountains, with the Snake River basin in the south; important for agriculture (Idaho potatoes), livestock, and silver-mining. Capital: Boise. Pop: 1 366 332 (2003 est). Area: 216 413 sq km (83 557 sq miles)
