A countable noun is a noun that can be counted.
Examples: house, page, mirror, piano, soldiers, cow etc.
A countable noun can be further divided into two groups:
1. Singular Noun
A singular noun is a noun that represents only one in number.
Example: boy, chicken, book, story, etc.
2. Plural Noun
A plural noun is a noun that represents more than one in number.
Example: pages, foxes, movies, doctors, heroes, etc.