keynote

US /ˈkiː.noʊt/
UK /ˈkiː.noʊt/
1.

discorso principale

1.

discorso principale

a prevailing tone or central theme, typically one set or introduced at the start of a conference.

:
individuality is the keynote of the Nineties
2.

discorso principale

the note on which a key is based.