A "department spokesperson" refers to a person who speaks on behalf of a particular department. They communicate or provide information about the department's activities, decisions, and policies to the public or the media. Full definition
«He [Kerry] made clear that continued military escalation and provocation in Crimea or elsewhere in Ukraine, along with steps to annex Crimea to Russia would close any available space for diplomacy, and he urged utmost restraint,» a US state department spokesperson said. (politics.co.uk)
«Preet Bharara is no longer US attorney of the Southern District of New York,» a Justice Department spokesperson told CNN Saturday. (edition.cnn.com)
A State Department spokesperson said the sanctions seek to prevent the Eritrean military from incarcerating, harassing, and repressing religious persons. (christianitytoday.com)