What is a Noun? Right from the moment the universe came into existence, grammar was here. Each entity of this world is separate: a man from a woman, a dog from a cat, a house from a vehicle…and so on. Within these as well, there are distinctions which keep them in their own space, a ‘name’ is one of the factors. These names, come to be known as “nouns” in grammar. A noun is defined as, a name of a person, a thing, a place, a feeling and virtually everything that has a name and can be named. Let us study more about nouns and kinds of noun in this article.