Definition of folding door
1 : a door in sections that can be folded back : an accordion door : double door
2 : either of a pair of sliding doors between two rooms en suite
Join MWU now and get access to America’s largest dictionary, with:
- 300,000 words that aren't in our free dictionary
- Expanded definitions, etymologies, and usage notes
- Advanced search features
- Ad free!
Seen and Heard
What made you want to look up folding door? Please tell us where you read or heard it (including the quote, if possible).