› polite behaviour, or a polite action or remark: He was treated with courtesy and hospitality. I have written to the customer relations director twice but he has not had the courtesy to reply. As a courtesy, we will email you if there is any change to these arrangements.
(by) courtesy of › with the permission of someone: Photo courtesy of Department of Transportation and Public Facilities › because of, or provided by, someone or something: Dealers were not excited about the market's performance, noting that the strong gains came courtesy of a handful of stocks. This offer comes to you courtesy of the One World travel company.