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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.

The belief stems from the denomination's approach to the Bible, whereby scripture is read literally, but using only the organisation's approved translations.

From BBC • Apr. 12, 2026

“Frankly, we respect Microsoft’s innovation culture, whereby it is willing to partner with others that may be innovating faster,” UBS said.

From Barron's • Mar. 25, 2026

The Chase Sapphire Reserve, for instance, has a feature called Pay Yourself Back, whereby cardholders can redeem points toward statement credits for purchases made in certain categories.

From The Wall Street Journal • Mar. 14, 2026

More specifically, the asset limit, whereby beneficiaries can keep only $2,000 in savings, has been frozen since 1989.

From MarketWatch • Mar. 10, 2026

We saw the COD as a means whereby our views could be put directly to the white public.

From "Long Walk to Freedom" by Nelson Mandela