1. the state of having good sense and sound judgment

- his rationality may have been impaired

Similar word(s): reason, reasonableness

Definition categories: state, saneness, sanity

2. the quality of being consistent with or based on logic

Similar word(s): rationalness

Definition categories: attribute, logicality, logicalness

Sentences with rationality as a noun:

- His sudden loss of rationality was brought on by excess drink.

- Such a discussion deserves rationality, not emotion a gut reaction.