subject, theme, topic - the subject matter of a conversation or discussion; "he didn't want to discuss that subject"; "it was a very sensitive topic"; "his letters were always on the theme of love"

keynote address, keynote speech - a speech setting forth the keynote

idea, thought - the content of cognition; the main thing you are thinking about; "it was not a good idea"; "the thought never entered my mind"

musical note, note, tone - a notation representing the pitch and duration of a musical sound; "the singer held the note too long"

music - an artistic form of auditory communication incorporating instrumental or vocal tones in a structured and continuous manner

set - put into a certain state; cause to be in a certain state; "set the house afire"

address, speak - give a speech to; "The chairman addressed the board of trustees"