The American Heritage® Dictionary of the English Language, 4th Edition
n. A frame house with two stories in front and one in back, having a pitched roof with unequal sides, being short and high in front and long and low in back.
n. a distinctively shaped wooden frame house with two storeys at the front and one behind, characteristic of New England
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. a type of house built in New England; has two stories in front and one behind
Word Usage
"The style that is called a saltbox has a low wall and roofline on the north side for protection from harsh weather and maintains a tall wall on the south for natural exposure to the sun’s warmth."