Recurrence Meaning: Definition, Examples and How to Use It
Recurrence means something happening again — a new occurrence of something that happened or appeared before. Merriam-Webster defines it as “a new occurrence of something that happened or appeared before: a repeated occurrence,” and Collins COBUILD agrees: “If there is a recurrence of something, it happens again.” It is the word of follow-up appointments and risk assessments: the recurrence of a disease, the recurrence of violence, the recurrence of a problem everyone thought was solved.
The word’s nearest neighbour is reoccurrence, and the relationship between the two is one of the most asked-about points in English usage. The honest dictionary position is this: the dictionaries treat them as near-synonyms, with recurrence the older, more established, and far more frequent form. This article sets out what the dictionaries actually say — no further — alongside the pronunciation, the grammar, and the word’s heavyweight territory in medicine.
What Does “Recurrence” Mean? The Dictionary Definitions
| Dictionary | Definition of recurrence |
|---|---|
| Merriam-Webster | “a new occurrence of something that happened or appeared before: a repeated occurrence.” Examples: “Scientists are working to lower the disease’s rate of recurrence“; “rules designed to prevent a recurrence of the 2008 financial crisis.” |
| Collins COBUILD | “[ + of ] If there is a recurrence of something, it happens again.” Example: “Police are out in force to prevent a recurrence of the violence.” |
| Webster’s New World (via Collins) | “the act or an instance of recurring; reoccurrence, return, repetition, etc.“ |
| Random House (via Collins) | “an act or instance of recurring“; “return to a previous condition, habit, subject, etc.“ |
Notice the grammar COBUILD flags: [ + of ]. Recurrence almost always arrives with of naming what is happening again — “recurrence of the violence,” “recurrence of the problem,” “recurrence of cancer.” The word is a variable noun (countable): one recurrence, two recurrences, “frequent recurrences.”
How to Pronounce “Recurrence”: UK and US
Four syllables, stress on the second: ri-KUR-runss.
- UK: /rɪˈkʌrəns/ — ri-KUR-unss, with the “u” of cup
- US: /rɪˈkɜrəns/ — ri-KUR-unss, with the “ur” of burn
Collins gives both transcriptions (British rɪˈkʌrəns, US rɪˈkɜrəns). The final -ence is an unstressed “unss,” never “en-see.” The related adjective is recurrent (/rɪˈkʌrənt/, ri-KUR-unt): “recurrent headaches,” “a recurrent theme.”
Where Does “Recurrence” Come From? The Etymology
Random House dates the word to 1640–1650 and analyses it as recur + -ence; Merriam-Webster records the first known use in 1626. The verb recur comes from Latin recurrere — re- (“back, again”) + currere (“to run”): literally, “to run back.” A recurrence is something running back to you.
Currere is a busy Latin root in English: current (running water), course, courier, curriculum (a running-track, then a course of study), concur (run together, agree), occur (run against, happen). Recurrence sits in that family as the noun for the running-back itself.
Recurrence vs. Reoccurrence: What the Dictionaries Actually Say
This is the distinction people ask about most, so here is the careful, dictionary-limited answer. Merriam-Webster defines reoccurrence as “a second or another occurrence” (from re- + occurrence), while it defines recurrence as “a new occurrence of something that happened or appeared before.” Webster’s New World lists “reoccurrence” as a straight synonym inside the recurrence entry. No dictionary consulted draws a sharp semantic line between them.
| Recurrence | Reoccurrence | |
|---|---|---|
| MW definition | “a new occurrence of something that happened or appeared before” | “a second or another occurrence” |
| First recorded | 1626 (MW) / 1640–50 (Random House) | Later formation (re- + occurrence) |
| Dictionary status | Full entry everywhere; the standard form | Listed, but as the junior variant |
| Practical advice | Default to recurrence. It is the established, more frequent, universally accepted form. Reoccurrence is not wrong, but it is never required — and in medical, legal, and academic writing, recurrence is the expected term. | |
Honesty note: you may see usage guides claiming recurrence means repeated or cyclical happening-again while reoccurrence means a single isolated repeat. None of the dictionaries consulted supports that distinction. The definitions overlap almost completely. The real difference is one of currency and register: recurrence is the word the dictionaries, the style guides, and the professions all reach for first.
The Medical Sense: “Recurrence” in Health Writing
Medicine is where recurrence does its heaviest work, and it does it neutrally. A recurrence in medical language is simply the return of a disease or condition after a period of improvement or remission — “the disease’s rate of recurrence” (MW), “a tumour recurrence” (Collins corpus), “no evidence of recurrence” in a check-up report. It is a descriptive term, not a diagnosis and not a prognosis: it names the fact that something has come back, nothing more.
Related terms you will meet nearby:
- Recurrence rate: the proportion of treated cases in which the condition returns — a statistic, used in comparing treatments.
- Recurrent: the adjective — “recurrent infections,” “recurrent depression” (happening repeatedly).
- Relapse vs. recurrence: in general use they overlap heavily; in some medical specialties relapse suggests the return of symptoms of an ongoing condition while recurrence suggests a new episode after full recovery — but this is specialty-specific usage, not a general dictionary distinction, so do not assert it as a rule.
Because this is health territory: if you are writing about your own health, “recurrence” is the word your doctors will use, and understanding it helps you read your own reports. Nothing in this article is medical advice.
Other Contexts: Finance, Sport, Everyday Life
Recurrence is not only a medical word. MW’s own examples spread it across public life: “rules designed to prevent a recurrence of the 2008 financial crisis.” Collins’s corpus adds “a recurrence of an old foot injury” (sport) and “the certain recurrence of disaster” (general gloom). COBUILD’s headline example is civic: “Police are out in force to prevent a recurrence of the violence.”
The pattern is consistent: recurrence appears wherever people are trying to prevent something from happening again. “Prevent a recurrence of” is one of the word’s most characteristic frames — the word looks backward (it happened before) and forward (we must stop it) at the same time.
Real Examples of “Recurrence” in Sentences
- “Police are out in force to prevent a recurrence of the violence.” (Collins COBUILD)
- “Scientists are working to lower the disease’s rate of recurrence.” (Merriam-Webster)
- “New regulations were designed to prevent a recurrence of the 2008 financial crisis.” (Merriam-Webster)
- “The striker suffered a recurrence of an old foot injury.”
- “There has been no recurrence of the fault since the system was updated.”
- “The novel’s recurrence of the storm motif gives the ending its power.” (literary: a theme coming back)
Correct vs. Incorrect Usage
| Correct ✓ | Incorrect ✗ | Why |
|---|---|---|
| “a recurrence of the problem” | “a recurrence the problem” | The noun takes of for what is happening again (COBUILD: [ + of ]) |
| frequent recurrences | “frequent recurrence” (as a plural idea) | Countable: add -s for more than one instance |
| “prevent a recurrence“ | “reoccurrence” where a style guide expects recurrence | Not wrong, but recurrence is the established default — use it unless you have a reason not to |
| “the recurrence rate” | “the recur rate” | Recur is the verb; the noun you need is recurrence |
Common Mistakes to Avoid
- Inventing a hard recurrence/reoccurrence rule. The dictionaries do not support one. Saying “recurrence is for cycles, reoccurrence for single repeats” sounds authoritative but is not dictionary-backed — present it at most as a style preference some writers hold.
- Using it for first occurrences. A recurrence is, by definition, a re-occurrence — something that happened before. A problem appearing for the first time is an occurrence, not a recurrence.
- Confusing recurrent and recurring. Both adjectives exist and overlap: recurrent (“recurrent dreams”) leans toward the habitual or characteristic; recurring (“a recurring meeting”) leans toward the scheduled or expected. In most sentences they are interchangeable.
- Overloading the medical sense. In general writing, “recurrence” does not automatically mean disease — “a recurrence of the IT outage” is perfectly normal. Context decides.
- Misspelling. It is re-cur-rence: double r (from re- + currere), single c, -ence not -ance. “Recurrance” and “reccurrence” are both wrong.
Frequently Asked Questions
What is the simple meaning of recurrence?
Something happening again. If there is a recurrence of a problem, a disease, or an event, it has come back after happening before.
What is the difference between recurrence and reoccurrence?
Very little, according to the dictionaries. MW defines recurrence as “a new occurrence of something that happened or appeared before” and reoccurrence as “a second or another occurrence”; Webster’s New World lists reoccurrence as a synonym inside the recurrence entry. Recurrence is the older, standard, universally accepted form — use it by default.
What does recurrence mean in medical terms?
The return of a disease or condition after treatment or remission — e.g. “no evidence of recurrence” at a check-up. It is a neutral descriptive term, not a diagnosis or a prediction.
How do you pronounce recurrence?
ri-KUR-runss, stress on the second syllable. UK /rɪˈkʌrəns/, US /rɪˈkɜrəns/.
Is it “recurrence of” or “recurrence in”?
“Recurrence of“ is the standard frame: “recurrence of the violence,” “recurrence of symptoms.” Of names what is happening again.
What is the adjective form of recurrence?
Recurrent: “recurrent headaches,” “a recurrent theme.” The verb is recur (“the problem recurred”), past tense recurred, present participle recurring (double the r).
The Takeaway
Recurrence is the running-back — something that happened before, happening again. It takes of (“recurrence of the problem”), it pluralises normally (“recurrences”), and it spans medicine, finance, sport, and everyday setbacks with the same meaning everywhere. Against its twin reoccurrence, the dictionaries decline to draw a hard line: recurrence is simply the established form, and the one to reach for. Spell it with the double r and the -ence ending, and it will serve you in every register from the clinic to the committee room.
