earth-shatteringEnglishOxford Dictionary of Englishearth-shattering /ˈəːθˌʃat(ə)rɪŋ / (also earth-shaking) ▸ adjective (in hyperbolic use) very important, shocking, or traumatic: tell me this earth-shattering news of yours. – DERIVATIVES earth-shatteringly (also earth-shakingly) adverb