definition
An abstract entity used to describe quantity.
example
Zero, one, −1, 2.5, and pi are all numbers.
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A numeral: a symbol for a non-negative integer.
example
The number 8 is usually made with a single stroke.
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An element of one of several sets: natural numbers, integers, rational numbers, real numbers, complex numbers, and sometimes extensions such as hypercomplex numbers, etc.
example
The equation e^{i\pi}+1=0 includes the most important numbers: 1, 0, \pi, i, and e.
definition
(Followed by a numeral; used attributively) Indicating the position of something in a list or sequence. Abbreviations: No or No., no or no. (in each case, sometimes written with a superscript "o", like Nº or №). The symbol "#" is also used in this manner.
example
Horse number 5 won the race.
definition
Quantity.
example
Any number of people can be reading from a given repository at a time.
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A sequence of digits and letters used to register people, automobiles, and various other items.
example
Her passport number is C01X864TN.
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A telephone number.
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(grammar) Of a word or phrase, the state of being singular, dual or plural, shown by inflection.
example
Adjectives and nouns should agree in gender, number, and case.
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(in the plural) Poetic metres; verses, rhymes.
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A performance; especially, a single song or song and dance routine within a larger show.
example
For his second number, he sang "The Moon Shines Bright".
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A person.
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An item of clothing, particularly a stylish one.
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A marijuana cigarette, or joint; also, a quantity of marijuana bought form a dealer.
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An issue of a periodical publication.
example
the latest number of a magazine
definition
A large amount, in contrast to a smaller amount; numerical preponderance.