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WordReference Random House Unabridged Dictionary of American English © 2024ra•tion•al•i•ty (rash′ə nal′i tē),USA pronunciation n., pl. -ties. - the state or quality of being rational.
- the possession of reason.
- agreeableness to reason;
reasonableness. - the exercise of reason.
- a reasonable view, practice, etc.
- Late Latin ratiōnālitās reasonableness. See rational, -ity
- 1560–70
Collins Concise English Dictionary © HarperCollins Publishers:: ˌratioˈnality /ˌræʃəˈnælɪtɪ/ n ( pl -ties)- the state or quality of being rational or logical
- the possession or utilization of reason or logic
- a reasonable or logical opinion
- the assumption that an individual will compare all possible combinations of goods and their prices when making purchases
ra•tion•al /ˈræʃənəl, ˈræʃnəl/USA pronunciation adj. - based on reason; fitting in with reason;
sensible:a rational decision. - using reason:a rational negotiator.
- sane;
able to think or speak clearly and logically:The patient seems perfectly rational.
ra•tion•al•i•ty /ˌræʃəˈnælɪti/USA pronunciation n. [uncountable] ra•tion•al•ly, adv. See -ratio-. WordReference Random House Unabridged Dictionary of American English © 2024ra•tion•al (rash′ə nl, rash′nl),USA pronunciation adj. - agreeable to reason;
reasonable;
sensible:a rational plan for economic development. - having or exercising reason, sound judgment, or good sense:a calm and rational negotiator.
- being in or characterized by full possession of one's reason;
sane;
lucid:The patient appeared perfectly rational. - endowed with the faculty of reason:rational beings.
- of, pertaining to, or constituting reasoning powers:the rational faculty.
- proceeding or derived from reason or based on reasoning:a rational explanation.
- Mathematics
- capable of being expressed exactly by a ratio of two integers.
- (of a function) capable of being expressed exactly by a ratio of two polynomials.
- Poetry[Class. Pros.]capable of measurement in terms of the metrical unit or mora.
n. - [Math.]See rational number.
- Latin ratiōnālis, equivalent. to ratiōn- (stem of ratiō) reason + -ālis -al1
- Middle English racional 1350–1400
- 2.See corresponding entry in Unabridged intelligent, wise, judicious, sagacious, enlightened.
- 6.See corresponding entry in Unabridged See reasonable.
- 2.See corresponding entry in Unabridged stupid.
- 3.See corresponding entry in Unabridged insane.
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