Meaning of NUMBER in English
( n. )
The distinction of objects, as one, or more than one (in some languages, as one, or two, or more than two), expressed (usually) by a difference in the form of a word; thus, the singular number and the plural number are the names of the forms of a word indicating the objects denoted or referred to by the word as one, or as more than one.
Webster's Revised Unabridged English Dictionary. Пересмотренный полный словарь английского языка Webster. 2012