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."