number

/ˈnʌm·bər/ n [C] (plural nos.) (abbreviation no.) (SYMBOL)

Definition

› a unit or its symbol that forms part of a system of counting and calculating, and that represents an amount or position in a series: You can write numbers in words, such as six, seven, and eight, or with symbols, such as 6, 7, and 8. › A number is also a specific set of symbols in a particular order that represent someone or something: Please write down your Social Security number. › A number can also be a position in a series: We’re up to 10 – who has the next number?

(Definition of number n (SYMBOL) from the Cambridge Academic Content Dictionary © Cambridge University Press)