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whereby

adverb, conjunction
 
 
/weəˈbaɪ/ US  /wer-/

Definition

C2 by which way or method: They've set up a plan whereby you can spread the cost over a period. We need to devise some sort of system whereby people can liaise with each other.Ways of achieving things not standard in which, or with which: It's put me in a position whereby I can't afford to take a job.Relative forms
(Definition of whereby adverbconjunction from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
Focus on the pronunciation of whereby