rationaladj詞源 1/ˈɹæʃ(ə)nəl/

• 1

  Capable of reasoning.

  • Man is a rational creature.
  • The utility of valid arguments is a monument to our frailty: to the fact that we are not completely rational beings.
• 2

  economicssciencesCapable of reasoning.

• 3

  Logically sound; not self-contradictory or otherwise absurd.

  • His statements were quite rational.
  • Prevention for the future is now almost universally allowed to be the only rational plea for the infliction of punishment; but this, when left to the arbitrary discretion of individuals, always has been found, and always will be found, to degenerate into the exercise of revenge for the past.
• 4

  Healthy or balanced intellectually; exhibiting reasonableness.

  • rational conduct
  • Temperature 99.8 degrees. Pulse 104. She was quite conscious and rational at times, at others very noisy.
• 5

  arithmeticmathematicssciencesComprising, or expressible as, a ratio

  • ¾ is a rational number, but √2 is an irrational number.
• 6

  algebramathematicssciencesComprising, or expressible as, a ratio

• 7

  algebraic-geometrygeometrymathematicsComprising, or expressible as, a ratio

• 8

  algebraic-geometrygeometrymathematicsComprising, or expressible as, a ratio

rationalnoun詞源 1/ˈɹæʃ(ə)nəl/

• 1

  mathematicssciencesA rational number: a number that can be expressed as the quotient of two integers.

  • The quotient of two rationals is again a rational.

rationalnoun詞源 2/ˈɹæʃ(ə)nəl/

• 1

  historicalThe breastplate worn by Israelite high priests.

  • The Rationale of iudgement alſo thou shalt mke with embrodered worke of diuers colours, according to the workmanship of the Ephod of gold, hyacinth, and purple, and ſcarlet twiſe died, and twiſted ſilke.