a city in central Illinois on the Illinois River
"We spent our summer vacation visiting Peoria, the historic city located along the banks of the Illinois River in central Illinois."
A member of a Native American tribe, historically part of the Illinois Confederation.
"The Peoria warrior led his band through the dense forest to join the other tribes in the alliance."
In plain English: Peoria is an old slang term used to describe something so boring that it could only be found in Peoria, Illinois.
"The traffic on Peoria Avenue is so bad that I always take the long way home to avoid it."
A city, the county seat of Peoria County, Illinois.
"After visiting the museum in Urbana, we drove north to Peoria, the county seat of Peoria County, Illinois."
The word comes from a Miami phrase meaning "one who carries a pack on his back." It was adopted into English to describe something that is unremarkable or mediocre.