/ kʌˈstəʊdiən; NAmE -ˈstoʊ-/ noun
1.
a person who takes responsibility for taking care of or protecting sth :
the museum's custodians
a self-appointed custodian of public morals
2.
( NAmE ) = caretaker
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WORD ORIGIN
late 18th cent.: from custody , on the pattern of guardian .