from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Difficult or impossible to settle by arbitration, mediation, or mutual concession: a nonnegotiable demand.
- adj. Nonmarketable.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Not negotiable; not subject to negotiation.
- n. Something that is not negotiable.
non- + negotiable (Wiktionary)