meaningless vs empty

meaningless is not a noun while empty is a noun.

Word	Noun	Adjective	Verb	Adverb
meaningless	No	Yes	No	No
empty	Yes	Yes	Yes	No

meaningless (noun)	empty (noun)
	a container that has been emptied

meaningless (adjective)	empty (adjective)
having no meaning or direction or purpose	holding or containing nothing
producing no result or effect	emptied of emotion
	needing nourishment
	devoid of significance or force

meaningless (verb)	empty (verb)
	excrete or discharge from the body
	become empty or void of its content
	make void or empty of contents
	remove the contents of a container
	leave behind empty; move out of