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

And, oh-so-coincidentally, Tom may just be looking for that same kind of freedom. —Kelly Lawler, USA Today, 7 Sep. 2025

The world has even changed quite a bit from 2018, when the most recent eight-year wheel deal was struck (coincidentally, the last time the telecast attracted more than 10 million viewers). —Michael Schneider, Variety, 5 Sep. 2025

The distance coincidentally matches the length of Elizabeth’s walk, but there are other similarities, too. —Literary Hub, 4 Sep. 2025

So complex was this undertaking that the project took seven years, launching in 1969 and missing its original plan to launch for the company’s centennial celebration in 1965 — coincidentally the year USM patented the ingenious ball joint that underpins its USM Haller modular furniture system. —Lily Templeton, Footwear News, 4 Sep. 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