Noun Definition:
A noun is a naming word that identifies a person, place, thing, or idea. It is a part of speech that is essential in forming sentences and conveying meaning.

Examples of Nouns:
- Person: John, teacher, doctor
- Place: school, park, city
- Thing: book, car, table
- Idea: love, happiness, freedom

Types of Nouns:
- Common nouns: general names for people, places, or things (e.g., girl, street, chair)
- Proper nouns: specific names of people, places, or things that are capitalized (e.g., Mary, Paris, Coca-Cola)
- Abstract nouns: names of qualities or ideas that cannot be physically seen or touched (e.g., joy, honesty, freedom)
- Collective nouns: names for groups of people or things (e.g., team, flock, family)

Function of Nouns:
- Subject: performs the action in a sentence
- Object: receives the action in a sentence
- Possessive: shows ownership or relationship
- Modifier: describes or gives more information about another word

Importance of Nouns:
Nouns are crucial in communication as they help us identify and refer to people, places, things, and ideas. They provide specificity and clarity in language, allowing us to express our thoughts and ideas effectively. Understanding nouns is fundamental in developing language skills and forming coherent sentences.

A noun is a word that names a person, place, thing, or idea.