b: consideration, cooperation, and generosity in providing something (as a gift or privilege); also:agency, means —used chiefly in the phrases through the courtesy of or by courtesy of or sometimes simply courtesy of
Everyone knows each other here, so we won't bother with the usual courtesies.
They shook hands and exchanged courtesies before beginning their discussion.
Civilized life cannot be sustained without hypocrisy. A certain moral code, a degree of courtesy and decorum, are necessary to keep our instincts under a modicum of control. —Ian Buruma, New York Review of Books, 2 Nov. 2006
Cara, who, courtesy of the cat, had a run in her leggings, picked up the phone in a panic … —Helen Schulman, Wigwag, November 1990
“Coffee, sir?” asked a sailor. I nodded, still chilled. The courtesy, the ordinariness of these men was in the context somehow curious. —Fred Reed, Harper's, September 1988
I tried to persuade him that all that Hamish Hamilton had attempted to do was to extend the kind of courtesies which cultural institutions thought to be his due. —Isaiah Berlin, New York Times Book Review, 12 Apr. 1987