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Synonyms

whereby

American  
[wair-bahy, hwair-] / wɛərˈbaɪ, ʰwɛər- /

conjunction

  1. by what or by which; under the terms of which.

  2. Obsolete. by what? how?


whereby British  
/ wɛəˈbaɪ /

pronoun

  1. by or because of which

    the means whereby he took his life

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

adverb

  1. archaic how? by what means?

    whereby does he recognize me?

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of whereby

First recorded in 1150–1200, whereby is from the Middle English word wherby. See where, by


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

A proposal has been put forward to add to Article 27 of the regulations a list of instances whereby a ban cannot be suspended.

From BBC ● Oct. 14, 2026

He also backed the traditional "self-policing" ethos at SW19, whereby fans respect the action.

From BBC ● Oct. 9, 2026

First, there was #tokenmaxxing, whereby American businesses encouraged their workers to use as much AI as possible.

From The Wall Street Journal ● Oct. 5, 2026

Strategists like Bank of America’s Michael Hartnett have described the ‘Anything But Bonds’ phenomenon since the pandemic whereby U.S.

From MarketWatch ● Oct. 1, 2026

It was also a public event, the beginning of a process whereby new knowledge, in opposition to the old culture of secrecy, established its legitimacy within a public arena.

From "The Invention of Science" by David Wootton

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