Definitions
1.nounAn abstract entity used to describe quantity."Zero, one, −1, 2.5, and pi are all numbers."
2.nounA numeral: a symbol for a non-negative integer."The number 8 is usually made with a single stroke."
3.nounAn element of one of several sets: natural numbers, integers, rational numbers, real numbers, complex numbers, and sometimes extensions such as hypercomplex numbers, etc."The equation e^{i\pi}+1=0 includes the most important numbers: 1, 0, \pi, i, and e."
4.noun(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."Horse number 5 won the race."
5.nounQuantity."Any number of people can be reading from a given repository at a time."
6.nounA sequence of digits and letters used to register people, automobiles, and various other items."Her passport number is C01X864TN."
7.nounA telephone number.
8.noun(grammar) Of a word or phrase, the state of being singular, dual or plural, shown by inflection."Adjectives and nouns should agree in gender, number, and case."
9.noun(in the plural) Poetic metres; verses, rhymes.
10.nounA performance; especially, a single song or song and dance routine within a larger show."For his second number, he sang "The Moon Shines Bright"."
11.nounA person.
12.nounAn item of clothing, particularly a stylish one.
13.nounA marijuana cigarette, or joint; also, a quantity of marijuana bought form a dealer.
14.nounAn issue of a periodical publication."the latest number of a magazine"
15.nounA large amount, in contrast to a smaller amount; numerical preponderance.
16.verbTo label (items) with numbers; to assign numbers to (items)."Number the baskets so that we can find them easily."
17.verbTo total or count; to amount to."I don’t know how many books are in the library, but they must number in the thousands."