poster

Etymology 1

post + -er

noun

1. A picture of a celebrity, an event etc., intended to be attached to a wall.
   He has posters of his favorite band, sports teams and holiday resorts up.
2. An advertisement to be posted on a pole, wall etc. to advertise something.
   I saw a poster for the film on the side of a bus.
3. (Internet) One who posts a message.
   Some posters left the online message board after the squabble.
4. (Australian rules football, informal) A shot that hits a goalpost, scoring one point.
5. (ice hockey, slang) A shot that hits a goalpost instead of passing into the goal.
   We got three posters in the third and lost.
6. (basketball) A dunk over a defending player.

verb

1. (transitive) To decorate with posters.
   to poster the walls of a bedroom

Etymology 2

post + -er, from post (“travel, dispatch”).

noun

1. (dated) A posthorse.
   we whirled along with four posters at a gallop 1854, Charles Lever, The Dodd Family Abroad
2. (archaic) A swift traveller; a courier.