poster /ˈpoʊstɚ/noun 8verb 1forms 3phrases 3 noun8 •a large piece of paper with a picture or news of an event on it, for fixing to a wallHe has posters of his favorite band, sports teams and holiday resorts up. •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. •(Internet) One who posts a message.Some posters left the online message board after the squabble. •(informal) A shot that hits a goalpost, scoring one point. •(slang) A shot that hits a goalpost instead of passing into the goal.We got three posters in the third and lost. •A dunk over a defending player. •(old-fashioned) A posthorse.we whirled along with four posters at a gallop — 1854 •(no longer used) A swift traveller; a courier. verb1 •To decorate with posters. formspostered · postering · posters Phrases with poster poster boyA male exemplar of some trait. poster childOne who is a prototypical or quintessential example of something. poster girlA female exemplar of some trait.