rational


rational

adjective

  1. agreeable to reason; reasonable; sensible: a rational plan for economic development.
  2. having or exercising reason, sound judgment, or good sense: a calm and rational negotiator.
  3. being in or characterized by full possession of one’s reason; sane; lucid: The patient appeared perfectly rational.
  4. endowed with the faculty of reason: rational beings.
  5. of, relating to, or constituting reasoning powers: the rational faculty.
  6. proceeding or derived from reason or based on reasoning: a rational explanation.
  7. Mathematics.
    1. capable of being expressed exactly by a ratio of two integers.
    2. (of a function) capable of being expressed exactly by a ratio of two polynomials.
  8. Classical Prosody. capable of measurement in terms of the metrical unit or mora.

noun

  1. Mathematics. rational number.

adjective

  1. using reason or logic in thinking out a problem
  2. in accordance with the principles of logic or reason; reasonable
  3. of sound mind; sanethe patient seemed quite rational
  4. endowed with the capacity to reason; capable of logical thoughtman is a rational being
  5. maths expressible as a ratio of two integers or polynomialsa rational number; a rational function

noun

  1. maths a rational number
adj.

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).

adj.

  1. Having or exercising the ability to reason.
  2. Influenced by reasoning rather than by emotion.
  3. Of sound mind; sane.
  4. Based on scientific knowledge or theory rather than practical observation.

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