from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Not trivial; of some importance.
- adj. Mathematics Of, relating to, or being an expression in which at least one variable is not equal to zero.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Not trivial.
- adj. Having at least one non-zero variable.
- adj. Needing significant computing power to solve; intractable.
From non- + trivial (Wiktionary)