placard
A sheet of paper or cardboard with a written or printed announcement on one side for display in a public place.
(obsolete) A public proclamation; a manifesto or edict issued by authority.
(obsolete) Permission given by authority; a license.
(historical) An extra plate on the lower part of the breastplate or backplate of armour.
(historical) A kind of stomacher, often adorned with jewels, worn in the fifteenth century and later.
The woodwork and frame of the door of a closet etc.
To affix a placard to.
To announce with placards.