What is the meaning of Nothing?

Not any thing; no thing.

An absence of anything, including empty space, brightness, darkness, matter, or a vacuum.

Something trifling, or of no consequence or importance.

A trivial remark especially in the term sweet nothings.

A nobody (insignificant person).

Not at all; in no way.

Completely unimportant.

Lacking effort or commitment.

Never mind; it's not important; forget what I said.

Source: wiktionary.org