Noun

• S: (n) irrational number, irrational (a real number that cannot be expressed as a rational number)
• direct hyponym / full hyponym
• S: (n) transcendental number (an irrational number that is not algebraic)
• direct hyponym / full hyponym
• direct hypernym / inherited hypernym / sister term
• S: (n) irrational number, irrational (a real number that cannot be expressed as a rational number)
• S: (n) real number, real (any rational or irrational number)
• S: (n) complex number, complex quantity, imaginary number, imaginary ((mathematics) a number of the form a+bi where a and b are real numbers and i is the square root of -1)
• S: (n) number (a concept of quantity involving zero and units) "every number has a unique position in the sequence"
• S: (n) definite quantity (a specific measure of amount)
• S: (n) measure, quantity, amount (how much there is or how many there are of something that you can quantify)
• S: (n) abstraction, abstract entity (a general concept formed by extracting common features from specific examples)
• S: (n) entity (that which is perceived or known or inferred to have its own distinct existence (living or nonliving))
• S: (n) algebraic number (root of an algebraic equation with rational coefficients)
• direct hypernym / inherited hypernym / sister term

Adjective

• S: (adj) irrational (not consistent with or using reason) "irrational fears"; "irrational animals"
• see also
• similar to
• antonym
• derivationally related form
• W: (n) irrationality [Related to: irrational] (the state of being irrational; lacking powers of understanding)
• S: (adj) irrational (real but not expressible as the quotient of two integers) "irrational numbers"