Source : Webster's Revised Unabridged Dictionary (1913)

Doorkeeper \Door"keep`er\, n.
   One who guards the entrance of a house or apartment; a
   porter; a janitor.

Source : WordNet®

doorkeeper
     n 1: an official doorkeeper as in a courtroom or legislative
          chamber [syn: {usher}]
     2: the lowest of the minor Holy Orders in the unreformed
        Western Church but now suppressed by the Roman Catholic
        Church [syn: {ostiary}, {ostiarius}]
     3: someone who guards an entrance [syn: {doorman}, {door guard},
         {hall porter}, {porter}, {gatekeeper}, {ostiary}]