What type of pronoun is nothing?

The pronoun 'nothing' is an indefinite pronoun, when referring to 'not any thing'.

Example: I have nothing to say about that.

The Word 'nothing' is a noun, when referring to a zero quantity or a worthless person or thing.

Example: The argument was a big nothing.

The Word 'nothing' is an adverb when used to modify a verb, an adjective, or another adverb.

Example: I saw nothing wrong with plan.

The Word 'nothing' is an adjective when used to describe a noun.

Example: He's had one nothing job after another.