- noun - a word that can be used to refer to a person or place or thing
--1 is a kind of content word, open-class word; substantive
--1 has particulars:collective noun; mass noun; count noun; proper noun, proper name; common noun - noun - a word that can serve as the subject or object of a verb
--2 is a kind of major form class
--2 is a member of declension - noun - a word that can serve as the subject or object of a verb