| Billboard 1. (n.) A piece of thick plank, armed with iron plates, and fixed on the bow or fore channels of a vessel, for the bill or fluke of the anchor to rest on. 2. (n.) A flat surface, as of a panel or of a fence, on which bills are posted; a bulletin board. Thesaurus Entries advertisement, affiche, announcement, banner, bill, billboard, broadside, carrier, carrier pigeon, circular, flier, handbill, homer, homing pigeon, mail car, mail coach, mail packet, mail train, mail truck, mailer, mailplane, notice, packet boat, pigeon post, placard, post boat, post car, post coach, post-horse, post-office car, railway mail car, sign, signboard |