1 a [noncount] : the activities that relate to running a company, school, or other organization ▪ He works in hospital administration. [=his work involves management of a hospital] ▪ She has a degree in business administration. b [count] : a group of people who manage the way a company, school, or other organization functions ▪ The editorial criticizes the college's administration for not taking a stand on the issue.
2 or Administration [count] a : a government or part of a government that is identified with its leader (such as a U.S. president or British prime minister) ▪ We studied U.S. foreign policy in/during the Reagan Administration. [=during the time when Reagan was President] ▪ the Thatcher administration ▪ Her lecture compared the policies of this administration to the previous one. ▪ Administration officials refused to comment. ▪ At first, the administration denied the allegations. b : a U.S. government department ▪ The drug has been approved by the U.S. Food and Drug Administration.
3 [noncount] : the act or process of providing or administering something ▪ the administration of justice ▪ oral administration of the drug