/ Dictionary / Index I isopag: Meaning and Definition of Find definitions for: i•so•pag Pronunciation: (ī'su-pag"), [key] — n. a line drawn on a map connecting all points where ice exists at approximately the same period during winter. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. isopachous isopectic Related Content Daily Word Quiz: pugilist Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language