| a long-haired, white, antelopelike wild goat, Oreamnos americanus, of mountainous regions of western North America, having short, black horns. |

| mountain goat n. A goat antelope (Oreamnos americanus) of the northwest North American mountains, having curved black horns and shaggy yellowish-white hair and beard. Also called Rocky Mountain goat. |
| Rocky Mountain goat n. See mountain goat. |