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a person who manages or has a talent for managing.
Law. a person appointed by a court to take charge of the estate of a decedent, but not appointed in the decedent’s will.
Also called Informal, admin. Computers.

a person who manages and supports a computer system or network, as in a business or other organization:
the company’s system administrator; a database administrator.
Compare .
a person who determines the site policies, appoints moderators, and manages the technical operation of an Internet message board or other interactive website:
a forum administrator.
a user account on a home computer accessible only by the user who manages the computer system.
Compare 1 (def 11b).
a user who has access to this user account.

Contemporary Examples

Sig Gissler, the administrator of the Pulitzer Prizes, said this is “not unusual”—it’s occurred 11 times before.
No Fiction Pulitzer Awarded! Jimmy So April 15, 2012

“We know that he came here with the intent of finding an administrator,” Jordan said in the press conference.
What Made One Goh, the Oikos University Shooter, Snap? Dara Kerr April 3, 2012

Now Rob Ford himself is a member of the group according to administrator, Korbett Matthews who says he is friends with the mayor.
Inside the Wild World of Crack-Smoking Toronto Mayor Rob Ford’s Facebook Defenders Gideon Resnick December 25, 2013

The administrator says that the site gets at least 15,000 unique hits a day.
Edward Snowden Inspires European Youths to Train as Spies Barbie Latza Nadeau July 10, 2013

As she tells it, a crossing guard overheard an administrator whisper about trustee resignations “tomorrow.”
What’s Really Behind the Prep-School Mom’s Twitter Meltdown Nick Summers April 13, 2011

Historical Examples

She adjudged the case on its merits, as it would be handled by an administrator of the law—the common law we all must keep.
Some Everyday Folk and Dawn Miles Franklin

Now then, John, you are the administrator of my father’s estate; you have seen what you have seen.
Her Father’s Daughter Gene Stratton-Porter

Gustavus, however, refused this honour, and governed the country for some time as administrator.
The Boy’s Book of Heroes Helena Peake

A married woman can be executor, administrator, guardian or trustee.
The History of Woman Suffrage, Volume IV Various

Such a splendid fellow, with an iron hand, just what an administrator ought to be.
Virgin Soil Ivan S. Turgenev

noun
a person who administers the affairs of an organization, official body, etc
(property law) a person authorized to manage an estate, esp when the owner has died intestate or without having appointed executors
a person who manages a computer system
n.

mid-15c., from Middle French administrateur or directly from Latin administrator “a manager, conductor,” agent noun from past participle stem of administrare (see administer). Estate sense is earliest. For ending, see -er.