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[per-sis-tuh ns, -zis-] /pərˈsɪs təns, -ˈzɪs-/
the act or fact of persisting.
the quality of being persistent:
You have persistence, I'll say that for you.
continued existence or occurrence:
the persistence of smallpox.
the continuance of an effect after its cause is removed.
Often, persistency.
Origin of persistence
First recorded in 1540-50; persist + -ence
Related forms
nonpersistence, noun
nonpersistency, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for persistency
Historical Examples
  • This persistency had struck the savant, and he asked a mutual friend to introduce him.

    My Double Life Sarah Bernhardt
  • And she had already begun to have some knowledge of the persistency of his character.

    Kept in the Dark

    Anthony Trollope
  • The judge and the lookers-on were puzzled by this persistency.

    Peak and Prairie Anna Fuller
  • This hint at MacLachlan's persistency exasperated me the more.

    John Splendid Neil Munro
  • Perhaps all this may account for the persistency with which I sat in my open window.

    The Bronze Hand Anna Katharine Green (Mrs. Charles Rohlfs)
  • But once—having the persistency of the needy—Abi Hafsa scored.

    A Boswell of Baghdad E. V. Lucas
  • She had some of her mother's persistency, and was not readily controlled.

    Mr. Kris Kringle S. Weir Mitchell
  • In spite of Mr. Gallatin's persistency no advance was made in the negotiation.

    Albert Gallatin John Austin Stevens
  • Some amusing stories are told of the persistency with which he hunted for orders.

    American Men of Mind Burton E. Stevenson
  • No less remarkable than the persistency of the mores is their changeableness and variation.


    William Graham Sumner
British Dictionary definitions for persistency


the quality of persisting; tenacity
the act of persisting; continued effort or existence
the continuance of an effect after the cause of it has stopped: persistence of vision
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
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Word Origin and History for persistency



1540s, from Middle French persistance, from persistant "lasting, enduring, permanent," from Latin persistentem (nominative persistens), present participle of persistere (see persist). Often spelled persistance 16c. Related: Persistency.

Online Etymology Dictionary, © 2010 Douglas Harper
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persistency in Medicine

persistence per·sist·ence (pər-sĭs'təns, -zĭs'-)

  1. Continuance of an effect after the cause is removed.

  2. Continuance of a part or an organ, rather than having it disappear in an early stage of development.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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