English Reference

Word

coincidentally

Phoneticsco·in·ci·den·tal·ly, stress on the fourth syllable

US/koʊˌɪnsɪˈdɛnəɫi/

UK/kəʊˌɪnsɪdˈɛntəli/

Sentence adverb

Definition

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.

Examples

“Coincidentally, we both wore the same shirt today.”

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

“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.”

Examples

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.

Real-World Examples

“It's also the second mission for Crew-13's commander, NASA's Jessica Watkins , who is, coincidentally, the first NASA astronaut to launch aboard a Crew Dragon spacecraft for a second time.”
Space 1 Oct 2026
“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

Word family

ADVERB

coincidentally(B2)

This entry

Exam level
CambridgeCambridgeCambridge English QualificationsThe exam suite from Cambridge University Press & Assessment, from A1 Movers up to C2 Proficiency. The benchmark names double as CEFR labels.B2 FirstIELTSIELTSInternational English Language Testing SystemThe 0–9 band test co-owned by the British Council, IDP, and Cambridge. Used for university entry, work, and migration.5.5–6.5TOEFL iBTTOEFL iBTTest of English as a Foreign Language, Internet-Based TestETS's academic English test, the standard route for US university admissions. Scored 0–120, with a 1–6 scale since 2026.1–6 scale: 4.0–4.572–94TOEICTOEICTest of English for International CommunicationETS's workplace English test, big in Japan and Korea. Listening & Reading scores 10–990 and tops out at C1.785–944EikenEikenTest in Practical English ProficiencyThe English proficiency test from the Eiken Foundation of Japan, widely taken by Japanese students. Grades run from 5 to 1, with Pre-1 and Pre-2 between them.Pre-1
Frequency
Frequent
Level
B2 · Upper Intermediate
Updated

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English Reference