A noun, in our opinion, can be defined as a word that describes a place, person, object, environment, an event in time, an event such as a gathering, a substance, the state of a substance (solid, liquid, or gas), or the quality of something.
About Nouns
A noun is sometimes referred to as a naming word.
There are proper nouns, common nouns, collective nouns, and mass nouns.
The word ‘noun’ is derived from Latin roots. A noun in Latin refers to the name.
Types of Noun
A proper noun is a word used to describe something in particular, for example, a particular place, person or event.

Usually proper nouns have capital letters because they are the name of the ‘thing’ that they name. Nouns used in this context can be seen in the sentence ‘David can do a great impersonation of Winston Churchill’. The names David and Winston Churchill both being proper nouns in this sentence.
A common noun is used to describing a general group type, for example, a particular demographic, race or religion of a person, or a building such as a supermarket, church, or bungalow.
Abstract nouns and concrete nouns are subsets of common nouns.
Abstract nouns describe ‘things’ that are not physical, for example emotions, or human acts. These could be the emotion of love or joy/happiness, and could also be the name given to acts of kindness or thoughtfulness towards others.
Concrete nouns describe ‘things’ that are physical, including a bungalow, a church, a car, or a tree.
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