1. [ noun ] (psychology,psychiatry) the state of having good sense and sound judgment
Synonyms: reason reasonableness

"his rationality may have been impaired" "he had to rely less on reason than on rousing their emotions"

Related terms: sanity argue
2. [ noun ] (logic) the quality of being consistent with or based on logic
Synonyms: rationalness
Related terms: logicality
Similar spelling:   rational