from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A roof on a motor vehicle, such as an automobile, having a panel that can be slid back or raised.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A fixed or operable opening in a vehicle roof (car or truck) which allows fresh air and/or light to enter the passenger compartment. A sunroof may include a transparent or opaque panel and may be manually operated or power driven.
from the GNU version of the Collaborative International Dictionary of English
- n. a panel in the roof of an automobile, usually above the driver's seat, that can be opened.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. an automobile roof having a sliding or raisable panel
From sun + roof (Wiktionary)