doorkeeper in WordNet English dictionary

1. someone who guards an entrance
   doorkeeper  doorman  door guard  hall porter  porter  gatekeeper  ostiary 
   
2. an official stationed at the entrance of a courtroom or legislative chamber
   usher  doorkeeper 
   
3. the lowest of the minor Holy Orders in the unreformed Western Church but now suppressed by the Roman Catholic Church
   doorkeeper  ostiary  ostiarius