/ ədˌmɪnɪˈstreɪʃn; NAmE / noun
1.
(also BrE informal admin ) [ U ] the activities that are done in order to plan, organize and run a business, school or other institution :
Administration costs are passed on to the customer.
the day-to-day administration of a company
I work in the Sales Administration department.
2.
[ U ] the process or act of organizing the way that sth is done :
the administration of justice
3.
[ C ] the people who plan, organize and run a business, an institution, etc. :
university administrations
4.
(often Administration ) [ C ] the government of a country, especially the US :
the Bush administration
Successive administrations have failed to solve the country's economic problems.
5.
[ U ] ( formal ) the act of giving a drug to sb :
the administration of antibiotics
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WORD ORIGIN
Middle English : from Latin administratio(n-) , from the verb administrare , from ad- to + ministrare wait upon, from minister servant, from minus less.