Online Google Dictionary

whereby 中文解釋 wordnet sense Collocation Usage Collins Definition
Adverb (relative)
/(h)we(ə)rˈbī/,
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By which,
  1. By which
    • - a system whereby people could vote by telephone
  1. By what, in which direction; how; By which; Where
  2. By or through which; by the help of which; in accordance with which.