What Is A Noun?

Put simply, a noun is a name; of a thing, person, group or concept.
There are four main types:
-common nouns.These are so called because they denote the name which a whole class or category has in common: dog, table, comma, country, mountain.
-proper nouns. These aren't "proper" in the modern sense of being authentic; the word comes from the same root as "property", and a proper noun is the special, individual name of a person, place or thing: Anna, Steve, Fido, New York, Mount Everest, Thursday, King Lear.
-abstract or non-concrete nouns. If you talk about something which can't be seen, heard, smelt etc, you'll probably use abstract nouns such as: happiness, wealth, idea, religion.
-collective nouns. The names of groups of people, animals or things: team, herd, pride (of lions) government, crew. Most collective nouns are well known, but some, especially animal nouns, are rare or falling out of use; a gaggle of geese, for instance, or a murder of crows.

A noun is a name; of a thing, person, group or concept