rational
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.
endowed with the faculty of reason: rational beings.
of, relating 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.
Classical Prosody. capable of measurement in terms of the metrical unit or mora.
Mathematics. rational number.
Origin of rational
1synonym study For rational
Other words for rational
2 | intelligent, wise, judicious, sagacious, enlightened |
Opposites for rational
Other words from rational
- ra·tion·al·ly, adverb
- ra·tion·al·ness, noun
- an·ti·ra·tion·al, adjective
- hy·per·ra·tion·al, adjective
- non·ra·tion·al, adjective
- o·ver·ra·tion·al, adjective
- pre·ra·tion·al, adjective
- qua·si-ra·tion·al, adjective
- trans·ra·tion·al, adjective
- ul·tra·ra·tion·al, adjective
- un·ra·tion·al, adjective
Words that may be confused with rational
- rational , reasonable (see synonym study at reasonable)
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024
British Dictionary definitions for rational
/ (ˈræʃənəl) /
using reason or logic in thinking out a problem
in accordance with the principles of logic or reason; reasonable
of sound mind; sane: the patient seemed quite rational
endowed with the capacity to reason; capable of logical thought: man is a rational being
maths expressible as a ratio of two integers or polynomials: a rational number; a rational function
maths a rational number
Origin of rational
1Derived forms of rational
- rationally, adverb
- rationalness, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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