/ Dictionary / Index I IL: Meaning and Definition of Find definitions for: IL Pronunciation: [key] Illinois (approved esp. for use with zip code). Il Pronunciation: [key] — Symbol, Chem. illinium. il- Pronunciation: [key] var. of (by assimilation) before l: illation. il- Pronunciation: [key] var. of (by assimilation) before l: illogical. -il Pronunciation: [key] var. ofcivil. il. Pronunciation: [key] illustrated. illustration. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: il (Thesaurus) ikon IL-1 Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language