| 1. | a paperboard sign or notice, as one posted in a public place or carried by a demonstrator or picketer. |
| 2. | Armor. placate 2 . |
| 3. | to display placards on or in: The square was placarded by peace marchers. |
| 4. | to publicize, announce, or advertise by means of placards. |
| 5. | to post as a placard. |