means A large farm, especially in western North America, devoted to raising livestock like cattle, sheep, or horses over open land.

from From Spanish 'rancho,' meaning a group of people who eat together or the hut where they do, which in Mexican and southwestern usage came to mean a small farm or homestead. American English borrowed it as cattle country pushed west in the 19th century, and 'rancho' got worn down to the blunter 'ranch.' The single-story sprawling 'ranch house' style — and the dressing — rode in on the word's coattails much later.