• synonyms


[fal-uh-buh l]
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  1. (of persons) liable to err, especially in being deceived or mistaken.
  2. liable to be erroneous or false; not accurate: fallible information.
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Origin of fallible

1375–1425; late Middle English < Medieval Latin fallibilis, equivalent to Latin fall(ī) (passive of fallere to deceive) + -ibilis -ible
Related formsfal·li·bil·i·ty, fal·li·ble·ness, nounfal·li·bly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for fallibility


  1. capable of being mistaken; erring
  2. liable to mislead
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Derived Formsfallibility or fallibleness, nounfallibly, adverb

Word Origin

C15: from Medieval Latin fallibilis, from Latin fallere to deceive
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 fallibility


1630s; see fallible + -ity.

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early 15c., from Medieval Latin fallibilis "liable to err, deceitful." literally "that can be deceived," from Latin fallere "deceive" (see fail).

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Online Etymology Dictionary, © 2010 Douglas Harper