Noun poster has 3 senses
  1. poster, posting, placard, notice, bill, card - a sign posted in a public place as an advertisement; "a poster advertised the coming attractions"
    --1 is a kind of sign
    --1 has particulars:
     show bill, show card, theatrical poster; flash card, flashcard
    Derived forms: verb post1, verb post2
  2. bill poster, poster, bill sticker - someone who pastes up bills or placards on walls or billboards
    --2 is a kind of worker
    Derived forms: verb post1, verb post2, verb post3
  3. post horse, poster - a horse kept at an inn or post house for use by mail carriers or for rent to travelers
    --3 is a kind of horse, Equus caballus
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