- 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.
Origin of rational
Synonyms for rational
Antonyms for rational
Examples from the Web for anti-rational
Historical Examples of anti-rational
Not only are judgements of worth never rationalizable—they are anti-rational.Tragic Sense Of Life
Miguel de Unamuno
This amounts to saying that reality is never fully rational, but is engaged in a struggle between the rational and anti-rational.
Word Origin for rational
late 14c., "pertaining to reason;" mid-15c., "endowed with reason," from Old French racionel and directly from Latin rationalis "of or belonging to reason, reasonable," from ratio (genitive rationis) "reckoning, calculation, reason" (see ratio).