What does "postman" mean?

Someone who delivers the post (mail) to, and/or collects the post from, residential or commercial addresses, or from public mailboxes.

Postman

Common synonyms include: mailman, letter carrier, letter carrier, mail carrier, mail carrier, mailman.

//ˈpəʊstmən// name, noun

name, noun ·Uncommon ·Advanced level

Noun

1
Someone who delivers the post (mail) to, and/or collects the post from, residential or commercial addresses, or from public mailboxes. Commonwealth, Ireland, UK
"The total of their members amounts to 342,723 for 1875. Among these number … 6,968 male and sixty-three female postmen, imperial railway, telegraph, and post officials, railway workmen, dependent boatmen, waiters, &c.; …"
2
a man who delivers the mail wordnet
3
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 being the tubman. England, historical
"Postman of the Court of Exchequer."