rational
//ˈræʃənəl//
Adjective
more rationalComparative
most rationalSuperlative
1
Based on or in accordance with reason or logic; sensible and able to make decisions based on intelligent thinking rather than emotion
We need to make a rational decision based on the facts.
2
Able to think clearly and make judgments based on reason; having the faculty of reasoning
Humans are rational beings capable of logical thought.
3
(mathematics) Expressible as a ratio of two integers; relating to or denoting a number that can be expressed as a fraction
The number 0.5 is rational because it can be expressed as 1/2.
Noun
1
A rational number; a number that can be expressed as the quotient or fraction of two integers
The number 3/4 is a rational because it can be expressed as a fraction of two integers.