referent vs signification

referent and signification both are nouns.

Word	Noun	Adjective	Verb	Adverb
referent	Yes	Yes	No	No
signification	Yes	No	No	No

As nouns, signification is a hypernym of referent; that is, signification is a word with a broader meaning than referent:

Other hypernyms of referent include import, meaning, significance.

referent (noun)	signification (noun)
something referred to; the object of a reference	the message that is intended or expressed or signified
the first term in a proposition; the term to which other terms relate
something that refers; a term that refers to another term

referent (adjective)	signification (adjective)
having reference