Countable or uncountable noun:
Nouns can be either countable or uncountable.
Countable nouns (count nouns) are those that refer to something that can be counted.
Example: boy, cup, pencil, book, plate , tree etc.
Uncountable nouns (mass nouns) do not typically refer to things that can be counted and so they do not regularly have a plural form. We can weigh or measure them.
Example: rice , wheat, milk, oil, cloth, wood , sand etc.
