Breadcrumb Home > Dictionary > Index B bentonite: Meaning and Definition of Find definitions for: ben•ton•ite Pronunciation: (ben'tn īt"), [key] — n. Mineral. a clay formed by the decomposition of volcanic ash, having the ability to absorb large quantities of water and to expand to several times its normal volume. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: bentonite (Thesaurus) Benton Harbor bentwood TrendingHere are the facts and trivia that people are buzzing about. The Olympian Gods and Goddesses (Their Names & Powers) The Largest States in the U.S. by Area Current Events This Week: March 2023 Christina Rossetti: Jesus, Do I Love Thee? 10 Biggest Waterfalls in the World (Tallest, Widest, & Most Volume!) World Religions: What People Believe and Where ✖ Related Content Daily Word Quiz: indolent Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language