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[thair-fawr, -fohr]
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  1. in consequence of that; as a result; consequently: I think; therefore I am.
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Origin of therefore

1125–75; Middle English ther(e)fore, variant of therfor therefor
Can be confusedtherefor therefore


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Synonym study

Therefore, wherefore, accordingly, consequently, so, then all introduce a statement resulting from, or caused by, what immediately precedes. Therefore (for this or that reason) and wherefore (for which reason) imply exactness of reasoning; they are especially used in logic, law, mathematics, etc., and in a formal style of speaking or writing. Accordingly (in conformity with the preceding) and consequently (as a result, or sequence, or effect of the preceding), although also somewhat formal, occur mainly in less technical contexts. So (because the preceding is true or this being the case) and then (since the preceding is true) are informal or conversational in tone.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words


Examples from the Web for therefore

Contemporary Examples

Historical Examples

  • The searchers, therefore, were directed to beat up the near-by country.

    The Spenders

    Harry Leon Wilson

  • More than a bare recital of the wretched facts, therefore, is not seemly.

    The Spenders

    Harry Leon Wilson

  • As a foil to his austerity, therefore, she would be audaciously gay in his presence.

    The Spenders

    Harry Leon Wilson

  • From that time, therefore, Captain Rushton was known as Mr. Smith.

    Brave and Bold

    Horatio Alger

  • Nevertheless, I have many things to thank him for, and therefore he deserves praise.

British Dictionary definitions for therefore


sentence connector
  1. thus; hence: used to mark an inference on the speaker's partthose people have their umbrellas up: therefore, it must be raining
  2. consequently; as a resultthey heard the warning on the radio and therefore took another route
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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

Word Origin and History for therefore


Old English þærfore; from there + fore, Old English and Middle English collateral form of for. Since c.1800, therefor has been used in sense of "for that, by reason of that;" and therefore in sense of "in consequence of that."

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Online Etymology Dictionary, © 2010 Douglas Harper