Definition of Idaho in US English:

Idaho

proper noun

  • A state in the northwestern US, bordering on the Canadian province of British Columbia to the north and containing part of the Rocky Mountains; population 1,523,816 (est. 2008); capital, Boise. It became the 43rd state of the US in 1890.

Pronunciation

Idaho

/ˈīdəˌhō//ˈaɪdəˌhoʊ/