An Encylopedia Britannica Company

The Britannica Dictionary mobile search

×

The Britannica Dictionary

IL

2 ENTRIES FOUND:

IL abbreviation

IL

abbreviation

Britannica Dictionary definition of IL

Illinois

ASK THE EDITOR

What are the plural forms of check-in, passerby, and spoonful?

See the answer »

QUIZZES

Vocabulary Quiz Icon

Vocabulary Quiz

Test your word power

Take the Quiz »

Name That Thing Icon

Name That Thing

Take our visual quiz

Test Your Knowledge »

WORD OF THE DAY

Facility Illustration

: a building that is built for a specific purpose

Learn More »