Breadcrumb Home > Dictionary > Index I Cite insulation: Meaning and Definition of Find definitions for: in•su•la•tion Pronunciation: (in"su-lā'shun, ins"yu-), [key] — n. material used for insulating. the act of insulating. the state of being insulated. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: insulation (Thesaurus) insulate insulative TrendingHere are the facts and trivia that people are buzzing about. January 2021 Current Events: US News Noble Titles and Ranks in a Monarchy Chinese New Year History, Meaning, and Celebrations The Manchu Keeping Your Brain Active in a COVID-19 World Inaugural Trivia Related Content Daily Word Quiz: evanescent Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language