verb

1. To label (items) with numbers; to assign numbers to (items).

   “Number the baskets so that we can find them easily.”

2. To total or count; to amount to.

   “I don’t know how many books are in the library, but they must number in the thousands.”

noun

1. A sequence of numbers indicating order or otherwise used for identification.

2. The action of creating or assigning such a sequence for identification.

3. The action of counting or ordering with numbers.

Synonyms: enumeration, telling