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Added 9 October 2026

thereby

/ðɛɹˈbaɪ/ adverb

adverb Definition from Wiktionary (CC BY-SA). Pronunciation from Wiktionary, via Kaikki.org. More about thereby at Wordnik → Where our words come from →

By it; by that; by that means, or as a consequence of that.
I enrolled in Old English classes and thereby learned much about Germanic languages.

Origin

From Middle English therby, from Old English ðǣrbig, equivalent to there + by. Compare the parallel formation of German dabei.

From Wiktionary, via Kaikki.org (CC BY-SA)

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