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(1)   An item of merchandise offered for sale
"She preferred the black nylon number"
"This sweater is an all-wool number"
(2)   A clothing measurement
"A number 13 shoe"
(3)   The property possessed by a sum or total or indefinite quantity of units or individuals
"He had a number of chores to do"
"The number of parameters is small"
"The figure was about a thousand"
(4)   The grammatical category for the forms of nouns and pronouns and verbs that are used depending on the number of entities involved (singular or dual or plural)
"In English the subject and the verb must agree in number"
(5)   A numeral or string of numerals that is used for identification
"She refused to give them her Social Security number"
(6)   The number is used in calling a particular telephone
"He has an unlisted number"
(7)   One of a series published periodically
"She found an old issue of the magazine in her dentist's waiting room"
(8)   A symbol used to represent a number
"He learned to write the numerals before he went to school"
(9)   A short theatrical performance that is part of a longer program
"He did his act three times every evening"
"She had a catchy little routine"
"It was one of the best numbers he ever did"
(10)   A select company of people
"I hope to become one of their number before I die"
(11)   A concept of quantity derived from zero and units
"Every number has a unique position in the sequence"


(12)   Place a limit on the number of
(13)   Enumerate
"We must number the names of the great mathematicians"
(14)   Determine the number or amount of
"Can you count the books on your shelf?"
"Count your change"
(15)   Give numbers to
"You should number the pages of the thesis"
(16)   Add up in number or quantity
"The bills amounted to $2,000"
"The bill came to $2,000"
(17)   Put into a group
"The academy counts several Nobel Prize winners among its members"

Etymology 1

, from , from , from .


  1. An abstract entity used to describe quantity.
    Zero, one, -1, 2.5, and pi are all numbers.
  2. A numeral: a symbol for a non-negative integer
    The number 8 is usually made with a single stroke.
  3. A member of one of several classes: natural numbers,integers, rational numbers, real numbers, complex numbers, quaternions.
    The equation e^{i\pi}+1=0 includes the most important numbers: 1, 0, \pi, i, and e.
  4. 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. Quantity.
    Any number of people can be reading from a given repository at a time
    His army is vast in number.
  6. 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.
  7. A performance; especially, a single song or song and dance routine within a larger show.
    For his second number, he sang "The Moon Shines Bright".


  1. To label (items) with numbers; to assign numbers to (items).
    Number the baskets so that we can find them easily.
  2. To total or count; to amount to.
    I don’t know how many books are in the library, but they must number in the thousands.