/ Dictionary / Index G glacis: Meaning and Definition of Find definitions for: gla•cis Pronunciation: (glā'sis, glas'is), [key] — pl. gla•cis gla•cis•es. a gentle slope. a bank of earth in front of the counterscarp or covered way of a fort, having an easy slope toward the field or open country. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. glaciology Glackens Related Content Daily Word Quiz: procrastinate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language