/ Dictionary / Index E esker: Meaning and Definition of Find definitions for: es•ker Pronunciation: (es'kur), [key] — n. Geol. a serpentine ridge of gravelly and sandy drift, believed to have been formed by streams under or in glacial ice. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: esker (Thesaurus) Esk. Eskilstuna Related Content Daily Word Quiz: laudable Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language