persistent
adjective
per·sis·tent
pər-ˈsi-stənt 
-ˈzi-
1
: existing for a long or longer than usual time or continuously: such 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 infectious for a relatively long time in a vector after an initial period of incubation
persistent viruses
2
a
: continuing or inclined to persist in a course
b
: continuing to exist despite interference or treatment
a persistent cough
has been in a persistent vegetative state for two years
persistently
adverb
Examples of persistent in a Sentence
Contrary to persistent myth, Hoover was an activist.
—
Steve Forbes, Forbes, 30 June 2008
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
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
We were nagged by a persistent salesman.
He is one of the government's most persistent critics.
She has been persistent in pursuing the job.
He has been fighting a persistent cold.
Flooding has been a persistent problem in the area this year.
Persistent rumors that the business is for sale have alarmed the staff.
Steve Forbes, Forbes, 30 June 2008
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
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
We were nagged by a persistent salesman.
He is one of the government's most persistent critics.
She has been persistent in pursuing the job.
He has been fighting a persistent cold.
Flooding has been a persistent problem in the area this year.
Persistent rumors that the business is for sale have alarmed the staff.
Recent Examples on the Web
But the discharges also can overwhelm the delicate estuaries east and west of the state’s largest lake and, during the warm summer months, spread blooms of toxic algae, an issue that has become more persistent in recent years.
—Amy Green, Miami Herald, 9 Jan. 2026
In Bug, Carrie Coon's Agnes White — an Oklahoma waitress too exhausted to outrun her past — faces a more persistent threat.
—Shania Russell, Entertainment Weekly, 9 Jan. 2026
Faithfull’s signature, distinctive, melodic, high-register vocals had defined her career, but her voice was permanently altered by severe laryngitis and her persistent drug abuse.
—Charlie Vargas, Oc Register, 8 Jan. 2026
The company says the system aims to tackle persistent challenges in the hospitality industry, including labor shortages, inconsistent drink quality, and long service times.
—Neetika Walter, Interesting Engineering, 7 Jan. 2026
See All Example Sentences for persistent
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Amy Green, Miami Herald, 9 Jan. 2026
In Bug, Carrie Coon's Agnes White — an Oklahoma waitress too exhausted to outrun her past — faces a more persistent threat.
—Shania Russell, Entertainment Weekly, 9 Jan. 2026
Faithfull’s signature, distinctive, melodic, high-register vocals had defined her career, but her voice was permanently altered by severe laryngitis and her persistent drug abuse.
—Charlie Vargas, Oc Register, 8 Jan. 2026
The company says the system aims to tackle persistent challenges in the hospitality industry, including labor shortages, inconsistent drink quality, and long service times.
—Neetika Walter, Interesting Engineering, 7 Jan. 2026
See All Example Sentences for persistent
Cite this Entry
“Persistent.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/persistent. Accessed 11 Jan. 2026.
Copy CitationKids Definition
persistent
adjective
per·sis·tent
pər-ˈsis-tənt
-ˈzis-
1
: continuing, existing, or acting for a long or longer than usual time
a persistent cold
persistent gills
2
: stubbornly determined
persistently
adverb
Medical Definition
persistent
adjective
per·sis·tent
-tənt
1
: existing or continuing for a long time: as
a
: 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 infectious for a relatively long time in a vector after an initial period of incubation
persistent viruses
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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