(mathematics) The limit of a convergent sequence of rational numbers, whether the limit is a rational number such as 2, -5, or 2/7 or whether the limit is an irrational number such as the square root of two or the circumference of the circle whose radius is one.

(complex analysis, strict sense) A number of the form bi, where b is any real number and i denotes the imaginary unit.

Used other than figuratively or idiomatically: see random, number. / A number allotted randomly using suitable generator (electronic machine or as simple "generator" as die).

(colloquial) A telephone number.

(mathematics) An integer / (mathematics) A natural number (positive or non-negative integer)

(mathematics) Of or relating to number theory.

(number theory) A number that is less than the sum of its proper divisors (all divisors except the number itself).

plural of rational number

plural of real number

(complex analysis) A number of the form a + bi, where a and b are real numbers and i denotes the imaginary unit