American English

Definition of thereby adverb from the Oxford Advanced American Dictionary

  

thereby

 adverb
adverb
NAmE//ˌðɛrˈbaɪ//
 
, NAmE//ˈðɛrbaɪ//
 
(formal)
 
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used to introduce the result of the action or situation mentioned Regular exercise strengthens the heart, thereby reducing the risk of heart attack.
See the Oxford Advanced Learner's Dictionary entry: thereby