/ Dictionary / Index I isotach: Meaning and Definition of Find definitions for: i•so•tach Pronunciation: (ī'su-tak"), [key] — n. Meteorol. a line on a weather map or chart connecting points where winds of equal speeds have been recorded. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. isotac isotactic Related Content Daily Word Quiz: penchant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language