Definition:
A large written or printed notice that is put in a public place or carried on a stick in a march.
In MUN, rather than representing their homeland, delegates are assigned to represent a random country on the given issue. Everyone could be about just any country on the list. The placard is a piece of card with the assigned country's name on it that a delegate raises in the air to signal to the Chair that he or she wishes to speak.
Examples:
Those who wish to speak, please raise their placards.
From the placard he holds, I can tell he is representing Brazil.
Please raise your placards high and clear when voting.
