undersecretary
noun [ C ] uk/ˌʌn.dəˈsek.rə.tər.i/ us/ˌʌn.dɚˈsek.rə.ter.i/
副部长;次长;政务次官;副国务卿
a person who works for and has a slightly lower rank than the secretary (= person in charge) of a government department
She's Undersecretary of State for Foreign Affairs. 她是负责外交事务的副国务卿。