What is Nothing?

Nothing definition and meaning on Dictionary terms:
no thing; not anything; naught: to say nothing.
no part, share, or trace (usually followed by of): The house showed nothing of its former magnificence.
something that is nonexistent.
nonexistence; nothingness: The sound faded to nothing.

something or someone of no importance or significance: Money is nothing when you’re without health.
a trivial action, matter, circumstance, thing, or remark: to exchange a few nothings when being introduced.
a person of little or no importance; a nobody.
something that is without quantity or magnitude.
a cipher or naught: Nothing from nine leaves nine.
(used in conventional responses to expressions of thanks): Think nothing of it. It’s nothing. Nothing to it.

in no respect or degree; not at all: It was nothing like that. Nothing dismayed, he repeated his question.

amounting to nothing, as in offering no prospects for satisfaction, advancement, or the like: She was stuck in a nothing job.