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.
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
: 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 infective for a relatively long time in a vector after an initial period of incubation <persistent viruses>
: continuing to exist despite interference or treatment <a persistent cough><has been in a persistent vegetative state for two years>