keynote

/หˆkiหหŒnoสŠt/

IPA: /K IY1 N OW0 T/

noun
  1. 1

    The note on which a musical key is based; the tonic.

  2. 2

    The main theme of a speech, a written work, or a conference.

  3. 3

    A speech that sets the main theme of a conference or other gathering; a keynote speech or keynote address.

verb
  1. 1

    To deliver a speech that sets the main theme of a conference or other gathering.

Source: https://en.wiktionary.org/wiki/keynote