noun
or pre·pos·tor prēˈpästə(r) ; also prae·pos·i·tor or pre·pos·i·tor -äzət-
( -s )
Etymology: Medieval Latin praepositor, praepostor, from Latin praepositus, praepostus (past participle of praeponere to put in front, put in charge of) + -or — more at preposition
: a monitor at an English public school