/ Dictionary / Index I insularize: Meaning and Definition of Find definitions for: in•su•lar•ize Pronunciation: (in'su-lu-rīz", ins'yu-), [key] — -ized, -iz•ing. to make into an island or represent as insular. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Insular Celtic insulate 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