from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The property of being rigorous, strictness.
from The Century Dictionary and Cyclopedia
- n. The quality or state of being rigorous; severity without allowance or mitigation; strictness; exactness; rigor.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. something hard to endure
- n. excessive sternness
rigorous + -ness (Wiktionary)