Excellent definition of Common noun
Common noun : a word (such as “singer,” “ocean,” or “car”) that refers to a person, place, or thing but that is not the name of a particular person, place, or thing. Also a noun that may occur with limiting modifiers (as a or an, some, every, and my) and that designates any one of a class of beings or things. Yet it refers to an object or thing. It's a name given to a group of similar things or persons. Examples in sentence I bought a car . She is a singer. Neither the girls nor boys is here. I went the shop . She's learning to derive a car . Are you going on the car . Where can I park my car . How did you come ?by car . He was a shy boy , but he grew to be a strong and confident man . He's a grown man now. The movie is popular with men and women . References: Oxford dictionary Merriam Webster dictionary Y. A. Salees