irrational
/ɪˈræʃənəl/
adjective
- Not based on reason or clear thinking; illogical.
- Her fear of spiders was so irrational that she refused to enter any room without checking the corners first.
- The manager made an irrational decision to fire the entire team without any evidence of wrongdoing.
- It is irrational to believe that wearing a certain color will bring you good luck.
- In mathematics, describing a number that cannot be expressed as a simple fraction of two integers.
- The square root of 2 is an irrational number because its decimal never repeats or ends.
- Students learn that irrational numbers like e appear frequently in advanced mathematics.
- Pi is one of the most famous irrational numbers, used in calculations involving circles.
Synonyms
noun
- An irrational number.
- Many irrationals, such as √3, are important in geometry.
- In algebra class, we learned how to identify rationals and irrationals on a number line.
- The teacher explained that the decimal expansion of an irrational never terminates.