- a river flowing from SW Canada through NW Montana and N Idaho, swinging back into Canada to the Columbia River. 400 miles (645 km) long.
- a member of a North American Indian people of British Columbia, Montana, and Idaho.
- the language of the Kutenai Indians.
- a river in W North America, rising in SE British Columbia and flowing south into NW Montana, then north into Idaho before re-entering British Columbia, broadening into Kootenay Lake, then flowing to the Columbia River. Length: 655 km (407 miles)