- doorkeeper, ostiary, ostiarius - the lowest of the minor Holy Orders in the unreformed Western Church but now suppressed by the Roman Catholic Church
--1 is a kind of clergyman, reverend, man of the cloth; holy order, order
- doorkeeper, doorman, door guard, hall porter, porter, gatekeeper, ostiary - someone who guards an entrance
--2 is a kind of guard
--2 has particulars: commissionaire; night porter; ticket collector, ticket taker