from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The state or condition of being usable.
- n. The degree to which an object, device, software application, etc. is easy to use with no specific training.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. the quality of being able to provide good service
usable + -ity. (Wiktionary)