Other forms: keynotes
A keynote is the central theme, or the main speech at a conference. Give the keynote.
The musical sense came first, since a keynote is the note a piece is built on. A keynote speech sets the theme rather than reporting anything, which is why it opens the day.
1nounkeynoteThe central theme, or the main speech at a conference.
“The keynote lasted forty minutes and nobody remembered any of it.”
keynote is a theme.
Key plus note, from the note that establishes the key of a piece of music.
From key + note.
Etymology from Wiktionary, CC BY-SA