rational
/ˈɹæʃ(ə)nəl/ adjective B1- Capable of reasoning. · Man is a rational creature.
- Behaving according to some partial order of preferences.
- Logically sound; not self-contradictory or otherwise absurd. · His statements were quite rational.
- Healthy or balanced intellectually; exhibiting reasonableness. · rational conduct
- Of a number, capable of being expressed as the ratio of two integers. · ¾ is a rational number, but √2 is an irrational number.
- Of an algebraic expression in indeterminates, or more generally a function: capable of being expressed as the ratio of two polynomials.
- Of a variety: (informally) geometrically simple almost everywhere; (formally) birationally equivalent to projective space
- Of a function between varieties: acting as a morphism on an open subset of its domain.
From the library
"She is ill, but she is quite rational."
Faria, since their first acquaintance, had been on all points so rational and logical, so wonderfully sagacious, in fact, that he could not understand how so much wisdom on all points could be allied with madness.
He was, too, very learned, and rational enough on all points which did not relate to his treasure; but on that, indeed, he was intractable.”
It would surely be much more rational if conversation instead of dancing made the order of the day.”
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