segno vs musical notation

segno and musical notation both are nouns.

Word	Noun	Adjective	Verb	Adverb
segno	Yes	No	No	No
musical notation	Yes	No	No	No

As nouns, musical notation is a hypernym of segno; that is, musical notation is a word with a broader meaning than segno:

segno: (music) a notation written at the beginning or end of a passage that is to be repeated
musical notation: (music) notation used by musicians

segno (noun)	musical notation (noun)
(music) a notation written at the beginning or end of a passage that is to be repeated	(music) notation used by musicians