from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A door with hinged or pleated sections that fold together when the door is opened.
from the GNU version of the Collaborative International Dictionary of English
- n. one of two or more doors filling a single and hung upon hinges.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. an interior door that opens by folding back in sections (rather than by swinging on hinges)
Sorry, no etymologies found.