thereby

adverb

there·​by t͟her-ˈbī How to pronounce thereby (audio)
ˈt͟her-ˌbī
1
: by that : by that means
thereby lost her chance to win
2
: connected with or with reference to that
thereby hangs a tale …William Shakespeare

Examples of thereby in a Sentence

He signed the contract, thereby forfeiting his right to the property.
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
This creates a tiny current that can be measured, thereby detecting the microwave photon. Ameya Paleja, Interesting Engineering, 3 Apr. 2026 Plants occupy the base of Earth's food webs and are consumed directly or indirectly by all higher life-forms, thereby functioning as the major source of food for humans and other animals. Encyclopedia Britannica, 2 Apr. 2026 Israel had long upheld a de facto moratorium on both executions and capital punishment sentencing, thereby leading by example in the region despite a complex security environment. Benjamin Weinthal , Amelie Botbol, FOXNews.com, 1 Apr. 2026 As a result, the Scandinavian producer can make textile fiber(s) from wood pulp or waste inputs—think leather, textiles and agricultural crop waste — thereby nixing the traditional chemical-dissolution route for viscose and lyocell production. Alexandra Harrell, Footwear News, 1 Apr. 2026 See All Example Sentences for thereby

Word History

First Known Use

before the 12th century, in the meaning defined at sense 1

Time Traveler
The first known use of thereby was before the 12th century

Cite this Entry

“Thereby.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/thereby. Accessed 5 Apr. 2026.

Kids Definition

thereby

adverb
there·​by t͟ha(ə)r-ˈbī How to pronounce thereby (audio)
t͟he(ə)r-;
ˈt͟ha(ə)r-ˌbī
ˈt͟he(ə)r-
1
: by that : by that means
thereby lost her chance to win
2
: connected with or with reference to that
thereby hangs a tale

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