/ Dictionary / Index I illicit: Meaning and Definition of Find definitions for: il•lic•it Pronunciation: (i-lis'it), [key] — adj. not legally permitted or authorized; unlicensed; unlawful. disapproved of or not permitted for moral or ethical reasons. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: illicit (Thesaurus) illiberal Illimani Related Content Daily Word Quiz: acquiesce Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language