RATIONAL


Meaning of RATIONAL in English

adj.1 of or based on reasoning or reason.

2 sensible, sane, moderate; not foolish or absurd or extreme.

3 endowed with reason, reasoning.

4 rejecting what is unreasonable or cannot be tested by reason in religion or custom.

5 Math. (of a quantity or ratio) expressible as a ratio of whole numbers.

Phrases and idioms:

rational dress hist. a style of dress adopted by some women in the late nineteenth century, including bloomers or knickerbockers. rational horizon see HORIZON 1c.

Derivatives:

rationality n. rationally adv.

Etymology: ME f. L rationalis (as RATION)

Oxford English vocab.      Оксфордский английский словарь.