Breadcrumb Home > Dictionary > Index I ill-use: Meaning and Definition of Find definitions for: ill-use Pronunciation: (v.il'yz'n.il'ys'), [key] — v., n. -used, -us•ing, —v.t. to treat badly, unjustly, cruelly, etc. —n. bad, unjust, or cruel treatment. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: ill-use (Thesaurus) illus. illusion TrendingHere are the facts and trivia that people are buzzing about. Animal Group Terminology Largest Countries in the World (by Area) Current Events This Week: January 2023 State Abbreviations Dinosaur Fossils (By U.S. State!) The Chinese Zodiac ✖ Related Content Daily Word Quiz: locution Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language