ostiary
  看門人
  Os·ti·a·ry n.; pl. -ries
  1. The mouth of a river; an estuary. [R.]
  2. One who keeps the door, especially the door of a church; a porter.
  ◄ ►
  ostiary
       n 1: the lowest of the minor Holy Orders in the unreformed
            Western Church but now suppressed by the Roman Catholic
            Church [syn: doorkeeper, ostiarius]
       2: someone who guards an entrance [syn: doorkeeper, doorman,
           door guard, hall porter, porter, gatekeeper]