n (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. (defdate|16th-17th c.)
n (context|now|_|historical) Someone who travels express along a set route carrying letters and dispatches; a courier. (defdate|from 16th c.)
n A state organisation for delivering letters, parcels etc., or the service provided by such an organisation. (defdate|from 17th c.)
n A single delivery of letters; the letters or deliveries that make up a single batch delivered to one person or one address. (defdate|from 17th c.)
n A message posted in an electronic forum. (defdate|from 20th c.)
n A location on a basketball court near the basket.
n (American football)(rfdef|lang=en|topic=sports)
v To send mail
v (Internet) To send a message to a Usenetnewsgroup or to a mailing list; to save a message on a blog.
v (transitive|Internet) To send to an electronic forum.
a With the post, on post-horses; express, with speed, quickly