From Longman Dictionary of Contemporary Englishplacardplac‧ard /ˈplækɑːd $ -ərd/ noun [countable] PPADVERTISEa large notice or advertisement on a piece of card, which is put up or carried in a public place a huge placard saying ‘Welcome to Derbyville’
Examples from the Corpus
placard• This made a placard spring out in the kitchen.• However, the department says it can do nothing about people with questionable disabilities legitimately obtaining a placard.• A small group of black dancers picketed the theater for two days, carrying placards and occasionally shouting slogans.• It voted last week to determine whether doctors are giving placards to the undeserving.• At Starbucks' corporate headquarters, the signature mermaid placard toppled into the parking lot below.• One placard in the crowd read, "Enough is enough!"• The men, members of the gay rights group Outrage, paraded placards in front of the altar before leaving peacefully.• He turned, like a winning boxer, and raised up both arms, still brandishing the placard.• He waved the placard in a wild and thoroughly stupid manner.Origin placard (1400-1500) French Old French plaquier “to make flat” 