noun substantive noun1 •(no longer used) A word that can be used to refer to a person, animal, place, thing, phenomenon, substance, quality, or idea; one of the basic parts of speech in many languages, including English.Q. What is a Noun? A. The Name of a Thing. Q. How many Sorts of Nouns are there? [...] A. A Noun Substantive, and a Noun Adjective. — 1753 formsnouns substantive