Pronunciation: (rash"u-nal'i-tē), [key]
1. the state or quality of being rational.
2. the possession of reason.
3. agreeableness to reason; reasonableness.
4. the exercise of reason.
5. a reasonable view, practice, etc.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.