Definition of Countable Noun
A noun which can be counted in cardinal numbers (1, 2, 3 . . .) is called a countable noun.

Example Countable Noun:
- I bought a book of neurology.
- The book has 269 pages in it.
- It has 39 chapters in it.
- Each chapter covers 5 topics.
- Alex has four pencils.
- He also has three erasers.
- He has a car.
- The dog barked at the mailman.
- I ate three apples today.
- She has six siblings.
- We need ten chairs for the meeting.
- He drank two glasses of water.
- They saw a herd of cows on the farm.
- She bought a dozen eggs from the store.
- The children made a tower of blocks.
- He collected several seashells on the beach.
- She counted five birds in the sky.
- The car contains four seats.
- He had a cat when he was young.
- The cat used to eat a cookie every day.
- I have a phone, few books, a notepad, a table-calendar, and a computer on my desk.
- I love to listen to songs when I work.
- How many times did I tell you to do this?
- I did it many times when I was young.
- Bring me a glass of water.