[rash-uh-nl, rash-nl] /ˈræʃ ə nl, ˈræʃ nl/
agreeable to reason; reasonable; sensible:
a rational plan for economic development.
having or exercising reason, sound judgment, or good sense:
a calm and rational negotiator.
being in or characterized by full possession of one’s reason; sane; lucid:
The patient appeared perfectly rational.
endowed with the faculty of reason:
of, relating to, or constituting reasoning powers:
the rational faculty.
proceeding or derived from reason or based on reasoning:
a rational explanation.
Classical Prosody. capable of measurement in terms of the metrical unit or mora.
using reason or logic in thinking out a problem
in accordance with the principles of logic or reason; reasonable
of sound mind; sane: the patient seemed quite rational
endowed with the capacity to reason; capable of logical thought: man is a rational being
(maths) expressible as a ratio of two integers or polynomials: a rational number; a rational function
(maths) a rational number
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).
rational ra·tion·al (rāsh’ə-nəl)
noun, Mathematics. 1. a number that can be expressed exactly by a ratio of two integers. noun 1. any real number of the form a/b, where a and b are integers and b is not zero, as 7 or 7/3 rational number A number that can be expressed as an integer or a quotient of […]
noun 1. any of the mathematical operations of addition, subtraction, multiplication, and division.
- Rational suicide
noun the concept that suicide is presumably a reasonable choice by a terminally ill person; also, the ending of one’s life for considered reasons as opposed to emotional/psychological reasons
- Rational therapy
rational therapy n. Psychotherapy based on the premise that a lack of information or illogical thought patterns basically cause the patient’s difficulties.