/ Dictionary / Index E erosion: Meaning and Definition of Find definitions for: e•ro•sion Pronunciation: (i-rō'zhun), [key] — n. the act or state of eroding; state of being eroded. the process by which the surface of the earth is worn away by the action of water, glaciers, winds, waves, etc. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: erosion (Thesaurus) erose erosion surface Related Content Daily Word Quiz: cetacean Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language