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persistent

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adjective per·sis·tent \pər-ˈsis-tənt, -ˈzis-\

Simple Definition of persistent

  • : continuing to do something or to try to do something even though it is difficult or other people want you to stop

  • : continuing beyond the usual, expected, or normal time : not stopping or going away

Full Definition of persistent

  1. 1 :  existing for a long or longer than usual time or continuously: as a :  retained beyond the usual period <a persistent leaf> b :  continuing without change in function or structure <persistent gills> c :  effective in the open for an appreciable time usually through slow volatilizing <mustard gas is persistent> d :  degraded only slowly by the environment <persistent pesticides> e :  remaining infective for a relatively long time in a vector after an initial period of incubation <persistent viruses>

  2. 2 a :  continuing or inclined to persist in a course(see persist) b :  continuing to exist despite interference or treatment <a persistent cough> <has been in a persistent vegetative state for two years>

per·sis·tent·ly adverb

Examples of persistent

  1. Contrary to persistent myth, Hoover was an activist. —Steve Forbes, Forbes, 30 June 2008

  2. The high-water mark of such truckling might be the publication of the Cato Institute report “America's Record Trade Deficit: A Symbol of Strength.” Freedom had become slavery; persistent deficits had become economic power. —Eric Janszen, Harper's, February 2008

  3. The silence started from your end just about the time you said good-bye to dear St. Elizabeth and it has been constant and persistent ever since. —Archibald Macleish, letter, 11 July 1959

  4. We were nagged by a persistent salesman.

  5. He is one of the government's most persistent critics.

  6. She has been persistent in pursuing the job.

  7. He has been fighting a persistent cold.

  8. Flooding has been a persistent problem in the area this year.

  9. Persistent rumors that the business is for sale have alarmed the staff.



Origin of persistent

Latin persistent-, persistens, present participle of persistere (see persist)


First Known Use: 1826


Medical Dictionary

persistent

play
adjective per·sis·tent \-tənt\

Medical Definition of persistent

  1. 1:  existing or continuing for a long time: asa:  effective in the open for an appreciable time usually through slow volatilizing <mustard gas is persistent>b:  degraded only slowly by the environment <persistent pesticides>c:  remaining infective for a relatively long time in a vector after an initial period of incubation <persistent viruses>

  2. 2:  continuing to exist despite interference or treatment <a persistent cough> <has been in a persistent vegetative state for two years>






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