D defs.my
Entry 2 senses Webster, 1913

Postman

/pōs'-tmən/ · Post·man · IPA /ˈpəʊs(t)mən/
01 n. A post or courier; a letter carrier.
pl. Postmen
  1. 1.
    A post or courier; a letter carrier.
  2. 2.
    One of the two most experienced barristers in the Court of Exchequer, who have precedence in motions; -- so called from the place where he sits. The other of the two is called the tubman.(Eng. Law)