American English

Definition of thereupon adverb from the Oxford Advanced American Dictionary



    , NAmE//ˌðɛrəˈpɔn//
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  1. 1immediately after the situation mentioned; as a direct result of the situation mentioned The audience thereupon rose cheering to their feet.
  2. 2on the thing mentioned a large notice with black letters printed thereupon
See the Oxford Advanced Learner's Dictionary entry: thereupon