English Reference
Adverb

coincidentally

adv. sent.
B2 Upper Intermediate US /koʊˌɪnsɪˈdɛnəɫi/ UK /kəʊˌɪnsɪdˈɛntəli/ co·in·ci·den·tal·ly

adv.happening at the same time by chance. You use this when two things happen together without anyone planning it.

adv.occurring by chance at the same time or in the same place. Often used as a sentence-modifying disjunct to introduce a surprising connection between two events.


SIMPLE

Coincidentally, we both wore the same shirt today.

CONTEXTUAL

I was just thinking about my old friend when, coincidentally, she called me on the phone.

COMPLEX

The two researchers published nearly identical findings in the same month, though they had, coincidentally, been working in complete isolation from one another for years.

Usage

Typically placed at the beginning of a sentence or before the main verb to highlight a chance connection.

It was four years to the day since the Belgian’s last goal, against Chelsea coincidentally enough.

The Guardian· 30 Aug 2026

Coincidentally, Woodrow Wilson signed the bill that created Mother’s Day that same year, 1914.

Smithsonian Magazine· 13 May 2019
This entry
Level B2 · Upper Intermediate
Frequency Frequent
Updated