/ Dictionary / Index I istle: Meaning and Definition of Find definitions for: is•tle Pronunciation: (ist'lē), [key] — n. a fiber from any of several tropical American plants of the genus Agave or Yucca, used in making bagging, carpets, etc. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. -istics Istomin 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