A hearing. It is usual for the executive of a country to whom a minister has been sent, to give such minister an audience. And after a minister has been recalled, au audience of leave usually takes place.
Law Dictionary – Alternative Legal Definition
In international law. A hearing; interview with the sovereign. The king or other chief executive of a country grants an audience to a foreign minister who comes to him duly accredited; and, after the recall of a minister, an “audience of leave” ordinarily is accorded to him.