Added 15 October 2026 keynote /ˈkiːˌnoʊt/ noun Categories: LanguageMind & IdeasRare Words noun ! Definition from Wiktionary (CC BY-SA). Pronunciation from Wiktionary, via Kaikki.org. More about keynote at Wordnik → Where our words come from → A speech that sets the main theme of a conference or other gathering; a keynote speech or keynote address. keynote speech The main theme of a speech, a written work, or a conference. The note on which a musical key is based; the tonic. verb To deliver a speech that sets the main theme of a conference or other gathering. Origin From key + note. From Wiktionary, via Kaikki.org (CC BY-SA) Related Words: tonictenortoneleitmotifpresenterspeakerspeechthemethematicdiscoursegistlecturer Back to today's word