noun

• (construction) A stud; a two-by-four.
• (dentistry) A long, narrow piece inserted into a root canal to provide retention for a crown.
• (vocal music, chiefly a cappella) A prolonged final melody note, among moving harmony notes.
• (paper, printing) A printing paper size measuring 19.25 inches x 15.5 inches.

verb

• (transitive) To hang (a notice) in a conspicuous manner for general review.
  "Post no bills."
• (transitive, by extension) To announce publicly; to publish.
  "The company posted record profits this quarter."
• (accounting) To carry (an account) from the journal to the ledger.
  "You have not poſted your Books theſe Ten years; hovv is it poſſible for a Man of Buſineſs to keep his Affairs even in the VVorld at this rate?"
• (transitive) To deposit a payment that may or may not be returned.
  "Since Jim was new to the game, he had to post $4 in order to receive a hand."

noun

• (obsolete) Each of a series of men stationed at specific places along a postroad, with responsibility for relaying letters and dispatches of the monarch (and later others) along the route.
• (dated) A station, or one of a series of stations, established for the refreshment and accommodation of travellers on some recognized route.
  "a stage or railway post"
• (now historical) Someone who travels express along a set route carrying letters and dispatches; a courier.
  "I fear my Julia would not deign my lines, Receiving them from such a worthless post."
• (UK, Australia, New Zealand) An organisation for delivering letters, parcels etc., or the service provided by such an organisation.
  "sent via post; parcel post"

verb

• (UK, Australia, New Zealand) To send (an item of mail etc.) through the postal service.
  "Mail items posted before 7.00pm within the Central Business District and before 5.00pm outside the Central Business District will be delivered the next working day."
• (horse-riding) To rise and sink in the saddle, in accordance with the motion of the horse, especially in trotting.
• (Internet) To publish (a message) to a newsgroup, forum, blog, etc.
  "I couldn't figure it out, so I posted a question on the mailing list."