doorkeeper

definition: someone who guards an entrance
example:
speech part: noun
synonyms: porter
definition: the lowest of the minor Holy Orders in the unreformed Western Church but now suppressed by the Roman Catholic Church
example:
speech part: noun
synonyms: ostiary ostiarius
definition: an official stationed at the entrance of a courtroom or legislative chamber
example:
speech part: noun
synonyms: usher

How doorkeeper is being used?