Alternative form of Erdős number

(mathematics) A number describing the degree of collaboration between a mathematician and Paul Erdős, defined such that a mathematician who has written a paper with Erdős has an Erdős number of 1, a mathematician who has written a paper with somebody having an Erdős number of 1 has an Erdős number of two, and so on.

plural of tone number

A number allocated to a syllable in various transliteration systems such as Hanyu Pinyin indicating the tone in which it is pronounced.

A telephone number dialled by mistake, for example by transposing digits. / A telephone call received from an unfamiliar caller, due to a mistake in the number dialled.

(idiomatic) A numbers game: the use of inappropriate statistics (numbers) to reflect a desired result (usually misleading). / plural of number game: lotteries, numbers games.

(computing) Any computing application that requires large amounts of numerical calculation.

A phone number as a mnemonic whose letters translate into numbers.

plural of 800 number

(mathematics) A mathematician who specializes in number theory