Is leaves countable or uncountable noun?

"Leaves" can be both countable and uncountable, depending on the context:

Countable: When referring to individual, separate leaves, "leaves" is countable.

* Example: "There are three leaves on the table."

* Plural form: "leaves"

Uncountable: When referring to leaves as a general mass or substance, "leaves" is uncountable.

* Example: "The gardener collected a pile of leaves."

* No plural form: "leaves"

Here's a simple way to think about it:

* Countable: You can count the individual leaves.

* Uncountable: You can't count the leaves individually, it's a general amount.