Definition of "perfunctory"

I caught the gist of what he was saying--which in effect was that he had found and captured this Galu, that she was his and that he defied anyone to question his right of possession. It appeared to me, as I afterward learned was the fact, that I was witnessing the most primitive of marriage ceremonies. The assembled members of the tribe looked on and listened in a sort of dull and perfunctory apathy, for the speaker was by far the mightiest of the clan.

1918, Edgar Rice Burroughs, chapter VIII, in The Land That Time Forgot

He then poured some wine for me to taste, and harassed me with perfunctory courtesies that had to be acknowledged.

1976 September, Saul Bellow, Humboldt’s Gift, New York, N.Y.: Avon Books, page 338

The second section of the episode charged from Winterfell to Highgarden and Oldtown in a way that felt perfunctory. I found myself asking, “We’re just getting to Winterfell?”

2017 July 30, Ali Barthwell, “Ice and fire finally meet in a front-loaded episode of Game Of Thrones (newbies)”, in The Onion AV Club‎

Even as former administration officials and Democratic leaders called on the president to tell his supporters to “go home,” Mr. Trump for hours did little to discourage them from storming the building. Instead, he issued two perfunctory tweets in which he asked them merely to remain “peaceful.”

2021 January 6, Luke Broadwater, Emily Cochrane, Matt Stevens, “Congress Rejects Republican Challenge to Pennsylvania Electors, After Day of Chaos”, in The New York Times‎

Alternatively it may mean that a perfunctory search is enough to ensure that a purchase is acceptable, so less search is carried out.

1992, Peter Bowbrick, The Economics of Quality, Grades, and Brands‎, page 55