number

noun:a mathematical entity used to represent quantity, order, or measurement
- The number 7 is considered lucky in many cultures.
noun:a symbol or group of symbols that stand for a numerical value
- On a digital clock, the number 12 appears twice each day.
noun:a countable amount or quantity of something
- A large number of tourists visited the museum during the summer.
noun:a telephone, fax, or other communication identifier composed of digits
- Please call me at my office number when you arrive.
noun:a musical composition or song performed in a show or recording
- The band's latest number topped the charts within a week.
verb:to assign numbers to items, often for the purpose of ordering or identification
- She numbered each page of the manuscript before sending it to the editor.