A ministry (usually preceded by the definite article, i.e., the ministry) refers to a collective body of government ministers headed by a prime minister or premier. It is described by the Oxford Dictionary as "a period of government under one prime minister”. Although the term "cabinet" can in some circumstances be a synonym, a ministry can be a broader concept which might include office-holders that do not participate in cabinet meetings. Other titles can include "administration" (in the United States) or "government" (in common usage among most parliamentary systems) to describe similar collectives.