Meaning

• A long dowel or plank protruding from the ground; a fencepost; a lightpost.

  "ram a post into the ground"

• A stud; a two-by-four.

• A pole in a battery.

• A long, narrow piece inserted into a root canal to provide retention for a crown.

• (chiefly a cappella) A prolonged final melody note, among moving harmony notes.

• A printing paper size measuring 19.25 inches x 15.5 inches.

• A goalpost.

• A location on a basketball court near the basket.

• The doorpost of a victualler's shop or inn, on which were chalked the scores of customers; hence, a score; a debt.

Meaning

• To hang (a notice) in a conspicuous manner for general review.

  "Post no bills."

• To hold up to public blame or reproach; to advertise opprobriously; to denounce by public proclamation.

  "to post someone for cowardice"

• To carry (an account) from the journal to the ledger.

• To inform; to give the news to; to make acquainted with the details of a subject; often with up.

• To pay (a blind).

  "Since Jim was new to the game, he had to post $4 in order to receive a hand."

• To put content online, usually through a publicly accessible mean, such as a video channel, gallery, message board, blog etc.