<p><strong>Noun</strong></p><ul><li>A word, phrase, or the like, appearing as the heading of a chapter, dictionary or encyclopedia entry, etc.</li><li>Catchword (def 2).</li><li>Head (def 26).</li></ul><p><strong>Verb</strong></p><ul><li>(Used with object)<ul><li>Keynoted, keynoting: To announce the policy of (a political party, campaign, assembly, etc.); deliver a keynote address at: The governor will keynote the convention.</li><li>To serve as the keynote for.</li><li>Music: To give the keynote of.</li></ul></li><li>(Used without object)<ul><li>Keynoted, keynoting: To provide a keynote, especially a keynote address: He refused an invitation to keynote.</li></ul></li></ul>