rational number

noun

: a number that can be expressed as an integer or the quotient of an integer divided by a nonzero integer

Examples of rational number in a Sentence

Recent Examples on the Web

OpenAI’s model proved that even when the variables are allowed to be any rational number—a whole number or a fraction—the mathematical world remains unsortable. — Joseph Howlett, Scientific American, 8 Oct. 2026

Specifically, is the set of all rational numbers, meaning those expressible as fractions, such as 1, or , or . — Quanta Magazine, 9 Sep. 2026

Word History

First Known Use

1873, in the meaning defined above

Rhymes for rational number

• cumber
• lumber
• slumber
• umber
• encumber
• outnumber
• renumber

Kids Definition

rational number

noun

: a number that can be expressed as a whole number or the quotient of two whole numbers