vt to announce by placards; as, to placard a sale.
2. placard ·noun a public proclamation; a manifesto or edict issued by authority.
3. placard ·noun an extra plate on the lower part of the breastplate or backplate.
4. placard ·vt to post placards upon or within; as, to placard a wall, to placard the city.
5. placard ·noun permission given by authority; a license; as, to give a placard to do something.
6. placard ·noun a kind of stomacher, often adorned with jewels, worn in the fifteenth century and later.
7. placard ·noun a written or printed paper, as an advertisement or a declaration, posted, or to be posted, in a public place; a poster.