The people waited on the platform for train Is common noun?

The word "people" in the sentence "The people waited on the platform for a train" is a common noun.

Here's why:

* Common nouns refer to general, non-specific things.

* Proper nouns refer to specific people, places, or things (like "John" or "London").

In the sentence, "people" refers to a general group of people, not any specific individuals.