Of a government or government official. ( holding an office means being in power)
usage: "being in office already gives a candidate a great advantage"; "during his first year in office"; "during his first year in power"; "the power of the president"
(n.) The company or corporation or persons collectively, whose place of business is in an office; as, I have notified the office.
(n.) That which is performed, intended or assigned to be done, by a particular thing or that which anything is fitted to perform; a function; -- answering to duty in intelligent beings.
(n.) The place where a particular kind of business or service for others is transacted; a house or apartment in which public officers and others transact business; as, the register's office; a lawyer's office.
(n.) Any service other than that of ordination and the Mass; any prescribed religious service.
(n.) That which a person does, either voluntarily or by appointment, for or with reference to, others; customary duty or a duty that arises from the relations of man to man; as, kind offices, pious offices.
Webster's Revised Unabridged Dictionary
(DoD) An enduring organization that is formed around a specific function within a joint force commander's headquarters to coordinate and manage support requirements.
Department of Defense Dictionary of Military and Associated Terms. 31 January 2011.