Sentence:  "Q." What is a <WSD>Noun</WSD>? A. The Name of a Thing. Q. How many Sorts of <WSD>Nouns</WSD> are there? [...] "A." A <WSD>Noun</WSD> Substantive, and a <WSD>Noun</WSD> Adjective. 
Meaning of the word marked with <WSD> tags:  Either a word that can be used to refer to a person, animal, place, thing, phenomenon, substance, quality or idea, or a word that modifies or describes a previous word or its referent; a substantive or adjective, sometimes also including other parts of speech such as numeral or pronoun.