Meaning of the word "keynote speaker" in English

What does "keynote speaker" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

keynote speaker

US /ˈkiː.noʊt ˈspiː.kər/
UK /ˈkiː.nəʊt ˈspiː.kər/
"keynote speaker" picture

Noun

a person who delivers a keynote address, typically at a conference or convention, setting the underlying tone and summarizing the main message or most important revelation

Example:
The CEO was invited to be the keynote speaker at the annual tech conference.
Her inspiring speech as the keynote speaker captivated the entire audience.