mandatory

英 ['mændət(ə)rɪ] 美['mændətɔri]

• adj. 强制的；托管的；命令的
• n. 受托者（等于mandatary）

1. the recipient of a mandate

2. a territory surrendered by Turkey or Germany after World War I and put under the tutelage of some other European power until they ar able to stand by themselves