A noun is a thing, e.g. cat, room, exam. Most of the time, we can talk about how many of these things we have: Bobby has three cats at home! It’s amazing how many rooms are empty in our school. I have ...

What exactly are countable nouns and how are they different from other nouns? Countable nouns are exactly what you think they are with no exceptions. They are the names of things that you can count.