custodian
n. countablen. a person who is responsible for taking care of a building or a valuable collection of objects. In some places, it is another word for a janitor or caretaker.
n. a person who has responsibility for or looks after something, such as a building, a museum collection, or a set of values. Often used in legal or institutional contexts to describe a formal guardian.
The custodian cleans the school every evening.
As the custodian of the historical archives, she ensures that the fragile documents are kept in a climate-controlled room.
The court appointed a legal custodian to manage the estate's assets until the heirs reached the age of majority, ensuring the capital remained protected from market volatility.
From a shortening of Latin custōdiānātus, from Latin custōdia (“a keeping, watch, guard, prison”), from custōs (“a keeper, watchman, guard”). By surface analysis, custody + -ian.
Often followed by the preposition 'of' to indicate the specific object or concept being guarded.