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1. Having or exercising the ability to reason. See Synonyms at logical.
2. Consistent with or based on reason or good judgment; logical or sensible: rational decisions.
3. Of sound mind; sane: wondered if the eccentric neighbor was not completely rational.
4. Mathematics Capable of being expressed as a quotient of integers.
n. Mathematics
A rational number.

[Middle English racional, from Old French racionel, from Latin ratiōnālis, from ratiō, ratiōn-, reason; see reason.]

ra′tion·al·ly adv.
ra′tion·al·ness n.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.rationalness - the quality of being consistent with or based on logic
logicality, logicalness - correct and valid reasoning


What is sound or reasonable:
Idiom: rhyme or reason.
References in periodicals archive ?
Structural frame: It focuses on rationalness, efficiency and structure, Human resources frame: It directed personal and organizational needs, Politic frame: It predicts different group conflicts and fighting for scarce sources.
As a parallel with this; hypothesis of structural frame reflect belief of rationalness. If Official arrangaments done correctly it reduces problem probability to minimum and it increase performance and quality.