thunderingPronunciation: /ˈθʌnd(ə)rɪŋ/Translate thundering | into Italian Definition of thundering adjective 1 [attributive] making a resounding, loud, deep noise:thundering waterfalls 2 informal extremely great, severe, or impressive:a thundering bore [as submodifier]:a thundering good readDerivatives thunderingly adverb [as submodifier]:it was so thunderingly dullthundering in other Oxford dictionaries Definition of thundering in the US English dictionary