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English definition of “number”

number

noun [C] (SYMBOL)   /ˈnʌm·bər/ (plural nos.) (abbreviation no.)
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 noun (SYMBOL) from the Cambridge Academic Content Dictionary © Cambridge University Press)
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