a midwestern state in north-central United States
"Illinois is a bustling midwestern state located in the north-central part of the United States."
a member of the Algonquian people formerly of Illinois and regions to the west
"The French missionary traveled through the territory where the Illinois lived before encountering other tribes further west."
the Algonquian language of the Illinois and Miami
"Before becoming a state, many Native Americans spoke an Algonquian dialect known as Illinois to communicate with their neighbors in the region."
A member of the above-mentioned tribe.
"The Illinois diplomat was a respected leader among his people before arriving at the treaty council."
In plain English: Illinois is a state located in the middle of the United States, known for its big city Chicago and many lakes along the Mississippi River.
"We are planning to visit Illinois this summer for our vacation."
A state of the United States, named for the people.
"Illinois is a state in the Midwestern region of the United States named after the Illinois Native American tribe."
From French Illinois, an adaptation of an Algonquian (perhaps Ojibwe) name derived from Miami ilenweewa ("he speaks the regular way").