Origin: Latin prefix post-
Definition, synonyms and related words
plural of poster
"The hallway was covered in colorful posters advertising the upcoming school plays and sports tournaments."
In plain English: Posters are large pictures or signs that you stick on walls to show information or advertise something.
"The classroom walls were covered with colorful posters about space and animals."
Usage: Use "posters" to refer to multiple large printed pictures or advertisements displayed in public places. Do not use this word when referring to a person who posts messages online, which requires a different term entirely.
Derived from French poster, which comes from Latin ponere meaning "to place," the term originally referred to things that were put up or posted publicly. It evolved in English to specifically denote large printed pictures or notices displayed on walls.