coincidentally

adverb

co·​in·​ci·​den·​tal·​ly (ˌ)kō-ˌin(t)-sə-ˈdent-lē 

-ˈden-tə-lē

1

: in a coincidental manner : by coincidence

lonely singles who meet coincidentally and click

—People

2

: it is or seems coincidental that

coincidentally, the dog died exactly one year after his owner did

Synonyms

• coincidently
• concurrently
• simultaneously

Examples of coincidentally in a Sentence

the final stages of the Napoleonic Wars were fought coincidentally with the U.S.-British conflict known as the War of 1812

Recent Examples on the Web

According to Countryside Veterinary Service, the number one most intelligent dog breed in the world is, coincidentally, the border collie. —Maria Azzurra Volpe, MSNBC Newsweek, 8 Aug. 2025

If the series of plates has three letters and three numbers, which coincidentally was the previous scheme in Arkansas and is still displayed on many plates, the total number of combinations is 17,576,000. —Frank Fellone, Arkansas Online, 8 Aug. 2025

Her sister Jessica Jeffers was also coincidentally impacted by the disruption Wednesday night, but at a Denver airport. —Alexandra Skores, CNN Money, 7 Aug. 2025

Last weekend, coincidentally, threw up another callback. —Chris Weatherspoon, New York Times, 1 Aug. 2025

Word History

Etymology

coincidental + -ly entry 2

First Known Use

1837, in the meaning defined at sense 1

Rhymes for coincidentally

• environmentally
• experimentally
• accidentally
• detrimentally
• fundamentally
• governmentally
• incidentally
• incrementally
• instrumentally
• sentimentally
• temperamentally
• mentally