connotation vs signification

connotation and signification both are nouns.

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

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

connotation: what you must know in order to determine the reference of an expression
signification: the message that is intended or expressed or signified

Other hypernyms of connotation include import, meaning, significance.

connotation (noun)	signification (noun)
an idea that is implied or suggested	the message that is intended or expressed or signified
what you must know in order to determine the reference of an expression