Definition of recurrence noun from the Oxford Advanced Learner's Dictionary

 

recurrence

 noun
noun
BrE BrE//ˈkʌrəns//
 
; NAmE NAmE//ˈkɜːrəns//
 
[countable, usually singular, uncountable]
 
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if there is a recurrence of something, it happens again attempts to prevent a recurrence of the problem The trouble with a back injury is that there is a great risk of recurrence. a high risk of recurrence a potentially fatal disease with a high recurrence rate
See the Oxford Advanced American Dictionary entry: recurrence