What is a Common Noun? A common noun is a noun that names a person, place or a thing of whose kind there are many others. Example: The cow is a very useful animal.The farmer is ploughing his field. Related posts: 100 Common Noun Examples in Sentences Article on Common Man’s Woes During the Monsoon Common Nouns and Proper Nouns – Exercises for Class 4 Common Nouns and Proper Nouns – Exercises for Class 6