Definitions

1. verb

to display or show something, especially a sign, symbol, or message, in a prominent or public place, often in a way that is intended to attract attention or provoke a reaction.

“The protesters placarded their message of dissent on the city walls.”

2. noun

a person who displays or shows signs, symbols, or messages in a public place, often as a way of attracting attention or expressing an opinion.

“The placarders were arrested for disrupting the city’s peaceful atmosphere.”