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1. Not (il- is used before an l, im- before a b, m or p, ir- before an r)
   - in-, im-, ir-, un-
    
2. In, into, towards, within (il- is used before an l, im- before a b, m or p, ir- before an r)
   - in-, im-, ir-

1. A midwestern state in north-central United States
   - Illinois, Prairie State, Land of Lincoln, Ill.

Type of: American state

Part of: America, middle west, Midwest, midwestern United States, the States, U.S., U.S.A., United States, United States of America, US, USA

Encyclopedia: Il-