limited edition vs edition

limited edition and edition both are nouns.

Word	Noun	Adjective	Verb	Adverb
limited edition	Yes	No	No	No
edition	Yes	No	No	No

As nouns, edition is a hypernym of limited edition; that is, edition is a word with a broader meaning than limited edition:

limited edition: an edition that is restricted to a specific number of copies
edition: the form in which a text (especially a printed book) is published

limited edition (noun)	edition (noun)
an edition that is restricted to a specific number of copies	something a little different from others of the same type
	an issue of a newspaper
	the form in which a text (especially a printed book) is published
	all of the identical copies of something offered to the public at the same time