Definition from macmillandictionary.com
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Can you read the numbers on the chart?
large numbers like 250,000
As a tennis player, she was rated number one (=the best) in the country.
The local trains will be arriving at platform number 4.
Her flat number is 16C.
Call this number to get a taxi.
I must have dialled the wrong number.
Your account number is printed on every cheque.
In order to get a job, you have to have a Social Security number.
a small number of shops
increasing numbers of drivers
This brings the total number of children to 12.
show-stopping numbers from Broadway musicals
She was wearing a little black number (=dress or outfit).
a recent number of a football magazine
back numbers (=old copies) of the Guardian
If the subject is plural, the verb has to be in the plural number.
A good loan officer can run the numbers for you so you can make the right decision.