1. rational

adjective. (ˈræʃənəl, ˈræʃnəl) Consistent with or based on or using reason.
Antonyms
unreasonable insane irrational illogical unaware imperceptible synthesis
Synonyms
sensible reasoning lucid coherent logical
Etymology
rational (English)
rational (Old French (842-ca. 1400))
rationale (Latin)
rationel (Old French (842-ca. 1400))
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2. rational

adjective. (ˈræʃənəl, ˈræʃnəl) Of or associated with or requiring the use of the mind.
Antonyms
physical unfair unconscious insensible
Synonyms
intellectual mental
Etymology
rational (English)
rational (Old French (842-ca. 1400))
rationale (Latin)
rationel (Old French (842-ca. 1400))

3. rational

noun. (ˈræʃənəl, ˈræʃnəl) An integer or a fraction.
Antonyms
unclear opaque incoherent nonadhesive analytic
Synonyms
real rational number real number
Etymology
rational (English)
rational (Old French (842-ca. 1400))
rationale (Latin)
rationel (Old French (842-ca. 1400))

4. rational

adjective. (ˈræʃənəl, ˈræʃnəl) Having its source in or being guided by the intellect (as distinguished from experience or emotion).
Antonyms
nonintellectual invalid
Synonyms
intellectual
Etymology
rational (English)
rational (Old French (842-ca. 1400))
rationale (Latin)
rationel (Old French (842-ca. 1400))
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