One entrusted with a (small) commission, such as an errand; especially, an attendant or subordinate employee in a public office, hotel, etc.
An undisclosed agent under European civil law.
A uniformed doorman.
A person who holds open the door at the entryway (entrance) to a building, summons taxicabs, and provides an element of security; in apartment buildings, he also accepts deliveries and may perform certain concierge type services.