/ Dictionary / Index E earthshaking: Meaning and Definition of Find definitions for: earth•shak•ing Pronunciation: (ûrth'shā"king), [key] — adj. imperiling, challenging, or affecting basic beliefs, attitudes, relationships, etc. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: earthshaking (Thesaurus) earth science earth-shattering Related Content Daily Word Quiz: fabricate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language