Definition of "Administration" :
noun: the act of meting out justice according to the law
noun: the act of administering medication
noun: the act of governing; exercising authority
noun: a method of tending to or managing the affairs of a some group of people (especially the group's business affairs)
noun: the persons (or committees or departments etc.) who make up a body for the purpose of administering something
"He claims that the present administration is corrupt."
noun: the tenure of a president
"Things were quiet during the Eisenhower administration."