Definition of "recurrence"

recurrence

noun
countable and uncountable, plural recurrences
1. Return or reversion to a certain state.
2. The instance of recurring; frequent occurrence.
  Quotations
  I shall insensibly go on from a rare to a frequent recurrence to the dangerous preparations.
  1860, Isaac Taylor, Logic in Theolog, Without Controversy
3. A return of symptoms as part of the natural progress of a disease.
4. Recourse.