a clothing measurement
“a number 13 shoe”
a concept of quantity involving zero and units
“every number has a unique position in the sequence”
an item of clothing
“she preferred the black nylon number”
a numbered item in a series
“take the number 2 to the main square, then change to the number 5”
a numeral or string of numerals that is used for identification and may be attached to accounts, memberships, etc.
“she refused to give them her Social Security number”
a select company of people
“I hope to become one of their number before I die”
give numbers to
“You should number the pages of the thesis”
the grammatical category for the forms of nouns and pronouns and verbs that are used depending on the number of entities involved (singular or dual or plural)
“in English the subject and the verb must agree in number”