the GNU version of the Collaborative International Dictionary of English
n. The roof of a house, especially the flat part of a roof.
The Century Dictionary and Cyclopedia
n. The roof or top of a house.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. the roof of a house
Word Usage
"We put a divan in this arbour, which overlooked the rushing river; and that and the housetop were our favourite places to smoke on cool summer evenings."