Meaning

noun a sign posted in a public place as an advertisement

verb post in a public place

verb publicize or announce by placards

originFrom Middle English placard (“official document”), from Middle French placard, placart, plaquart (“a placard, a writing pasted on a wall”), from the Old French verb plaquer, plaquier (“to stick or paste, roughcast”), from Middle Dutch placken, plecken (“to glue or fasten, plaster, patch”), ultimately from Proto-Germanic *plaggą (“a piece of cloth, patch”), equivalent to plaque + -ard. Related to…

Etymology from Wiktionary, CC BY-SA 3.0