What does NUMBER mean?

noun

1. the property possessed by a sum or total or indefinite quantity of units or individuals“he had a number of chores to do”
2. a concept of quantity involving zero and units“every number has a unique position in the sequence”
3. a short theatrical performance that is part of a longer program“he did his act three times every evening”
4. the number is used in calling a particular telephone“he has an unlisted number”
5. a symbol used to represent a number“he learned to write the numerals before he went to school”
6. one of a series published periodically“she found an old issue of the magazine in her dentist's waiting room”
7. a select company of people“I hope to become one of their number before I die”
8. a numeral or string of numerals that is used for identification“she refused to give them her Social Security number”