Definition of "vapid"

In Koons' best-known works—a life-sized poly-chromed wood replica of Michael Jackson and his pet chimp Bubbles; vapid fin de siècle readymades such as a trio of basketballs floating in a fishtank […]

1995, Steven Daly, Nathaniel Wice, “Koons, Jeff”, in alt.culture, New York: HarperPerennial

Then there was a little more trite conversation between Mr. Arabin and Mr. Harding; trite, and hard, and vapid, and senseless.

1857, Anthony Trollope, Barchester Towers, Volume the Second, page 30