Webster’s Revised Unabridged Dictionary · 1913
Poster
Post′er (·ẽr), n. 1. A large bill or placard intended to be posted in public places.
2. One who posts bills; a billposter.
Post′er, n. 1. One who posts, or travels expeditiously; a courier. "Posters of the sea and land." Shak.
2. A post horse. "Posters at full gallop." C. Lever.