What is the meaning of bearer?

noun

• Someone whose employment involves carrying something.
  • usage: "the bonds were transmitted by carrier"
  • synonyms: carrier, toter
• A messenger who bears or presents.
  • usage: "a bearer of good tidings"
• One of the mourners carrying the coffin at a funeral.
  • synonyms: pallbearer
• 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.
  • usage: "the bond was marked `payable to bearer'"
  • synonyms: holder