whereby
Americanconjunction
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by what or by which; under the terms of which.
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Obsolete. by what? how?
pronoun
adverb
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.
On Thursday, Anthropic reported a similar mishap whereby a setup error allowed its Claude models to reach the open internet during safety evaluations and compromise the infrastructure of three real-world organizations.
From MarketWatch ● Aug. 2, 2026
She criticises the current system whereby parents can be fined if they take their children on holiday during term time.
From BBC ● Jul. 17, 2026
To comply with independence rules, Eide Bailly said it would set up an alternative practice structure whereby its nonaudit business will receive the Reverence investment and the audit business will remain a licensed CPA firm.
From The Wall Street Journal ● Jun. 23, 2026
In a separate initiative, the legislation established a pilot program whereby the federal government pays $1,000 into an account for babies born in the years 2025 through 2028.
From MarketWatch ● Jun. 23, 2026
Transcribing the oral number system into written form was a simple task: people just needed to figure out a coding method whereby scribes could set the numbers down in a more permanent form.
From "Zero: The Biography of a Dangerous Idea" by Charles Seife
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
