Definition of recurs:
(v) :
Of an event, situation, etc.: to appear or happen again, especially repeatedly.
(v) :
(medicine) Of a disease or symptom: to happen again, especially repeatedly or after a remission or an apparent recovery.
(v) :
Of a memory, thought, etc.: to come to the mind again.
(v) :
(computing) Synonym of recurse (“to execute a procedure recursively”).
(v) :
(mathematics) Often in the form recurring following a number: of a numeral or group of numerals in a decimal fraction: to repeat indefinitely.
(v) :
(dated) To speak, think, or write about something again; to go back or return to a memory, a subject, etc.