An agreement between Britain, France, Germany, and Italy, signed at Munich on 29 September 1938, under which the Sudetenland was ceded to Germany.
慕尼黑协定（1938年9月29日英法德意四国在慕尼黑签订的协议，根据协议，苏台德区被割让给德国）
Definition of Munich Agreement in US English:
Munich Agreement
proper noun
An agreement between Britain, France, Germany, and Italy, signed at Munich on September 29, 1938, under which the Sudetenland was ceded to Nazi Germany, often cited as an example of misjudged or dishonorable appeasement.