ranch house

1. The building on a ranch occupied by its operator.
2. A rectangular, one-story house with a low-pitched roof.

Originally a low, rambling, one-story house typical of the western United States; now used to describe almost any one-story house. See California Ranch.

A rambling one-story house, especially popular in the mid-20th century; usually designed to emphasize the horizontal aspects of the house. Typically characterized by: an asymmetrical plan; exterior wall cladding of stucco, brick, wood, or some combination thereof; a low-pitched roof with eaves having a moderate-to-wide overhang, a hipped, cross-gabled, or side-gabled roof; exposed rafters; ribbon windows, windows decorated with shutters; frequently, glass sliding doors that open onto a porch or patio at the side or rear of the house; an attached garage.

The noun has one meaning:

Meaning #1: a one story house with a low pitched roof