That occurs again or is repeated, esp. frequently, regularly, or periodically. Frequently with modifying word: cf. often-recurring at often, adv. adj.…

Done again or many times; renewed; frequent.

Of an action, event, thing, etc. Cf. reiterate, v. 1.

Of a period of time, esp. a year: passing and recurring in a constant cycle.

Medicine. Of a disease, symptom, or condition: occurring again, esp. repeatedly or periodically; reappearing after remission or apparent cure.

gen. Characterized by repetition; repetitive; (in early use, of an echo) repeating the same sound several times (now rare).

That can recur.