Definitions of bearer:

• noun:   a messenger who bears or presents

  Example: "A bearer of good tidings"

• noun:   someone whose employment involves carrying something
• noun:   the person who is in possession of a check or note or bond or document of title that is endorsed to him or to whoever holds it

  Example: "The bond was marked `payable to bearer'"

• noun:   one of the mourners carrying the coffin at a funeral