from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Of, relating to, or being a quantity that is either positive or zero.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. (of a quantity) Not negative; either zero or positive
- n. Any value that is not negative.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adj. either positive or zero
non- + negative (Wiktionary)