grammatical meaning vs meaning

grammatical meaning and meaning both are nouns.

Word	Noun	Adjective	Verb	Adverb
grammatical meaning	Yes	No	No	No
meaning	Yes	Yes	No	No

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

grammatical meaning: the meaning of a word that depends on its role in a sentence; varies with inflectional form
meaning: the message that is intended or expressed or signified

Other hypernyms of grammatical meaning include import, significance, signification.

grammatical meaning (noun)	meaning (noun)
the meaning of a word that depends on its role in a sentence; varies with inflectional form	the idea that is intended
	the message that is intended or expressed or signified

grammatical meaning (adjective)	meaning (adjective)
	rich in significance or implication