Appeasement in a political context is a diplomatic policy of making political or material concessions to an enemy power in order to avoid conflict.
Let’s turn to Wiki for a brief history lesson:
The term (appeasement) is most often applied to the foreign policy of the British Prime Ministers Ramsay Macdonald, Stanley Baldwin and Neville Chamberlain towards Nazi Germany between 1935 and 1939. Their policies of avoiding war with Germany have been the subject of intense debate for more than seventy years among academics, politicians and diplomats. The historians’ assessments have ranged from condemnation for allowing Adolf Hitler‘s Germany to grow too strong, to the judgment that they had no alternative and acted in Britain’s best interests. At the time, these concessions were widely seen as positive, and the Munich Pact concluded on 30 September 1938 among Germany, Britain, France, and Italy prompted Chamberlain to announce that he had secured “peace for our time.”
So what do you make of it?