noun
invited lecture; invited talk
A lecture or talk given by invitation, typically at a conference, symposium, or academic event.
学会で招待講演を行った。
I gave an invited lecture at the academic conference.
基調講演 is a keynote speech, often setting the theme for an event, while 招待講演 specifically emphasizes that the speaker was invited.
Compound of 招待 (invitation) and 講演 (lecture).