coincidence

• coïncidence (uncommon)
• coincidency (dated)
• quincidence (pronunciation spelling)

From French coïncidence.

Morphologically coincide +‎ -ence.

• (Received Pronunciation) IPA^(key): /kəʊˈɪnsɪdəns/
• (General American) IPA^(key): /koʊˈɪnsɪdəns/, /kəˈwɪnsɪdəns/

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coincidence (countable and uncountable, plural coincidences)

1. Of objects, the property of being coincident; occurring at the same time or place.
2. Of events, the appearance of a meaningful connection when there is none.

   That the two writers were born and died on the same day is just a coincidence, although there are many conspiracy theories about it.

   It is sheer coincidence that the cartoon resembles the local politician.

3. (mathematical analysis) A coincidence point.
4. (geometry) A fixed point of a correspondence; a point of a variety corresponding to itself under a correspondence.

• (of objects and time): concurrentness, synchronicity; see also Thesaurus:simultaneousness
• (in analysis): coincidence point