vague vs undefined

vague and undefined both are adjectives.

Word	Noun	Adjective	Verb	Adverb
vague	No	Yes	No	No
undefined	No	Yes	No	No

As adjectives, vague and undefined are synonyms defined as:

vague and undefined: not precisely limited, determined, or distinguished

vague (adjective)	undefined (adjective)
not precisely limited, determined, or distinguished	not precisely limited, determined, or distinguished
lacking clarity or distinctness
not clearly expressed or understood