trusteeship

trusteeship
/-ʃɪp; -ʃɪp/ n
1 [U, C] position of a trustee 受信托人的职责.
2 [U] responsibility for the administration of a territory granted to a country by the United Nations Organization 托管（联合国委托某一国家管理某一地区）.

牛津英汉双解词典