coincidentally

adverb

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

-ˈdent-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 of coincidentally

• 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

Not coincidentally, these are the decades when adults are the most physically active (though lifetime physical activity levels probably peak for most of us at about age 3, research shows, and decline from then on). — Aaron Steckelberg, Washington Post, 9 Oct. 2026

The photo hangs in the Andrée Putman Studio at 344 Bowery, coincidentally situated right by Basquiat’s old digs. — David Moin, Footwear News, 6 Oct. 2026

There is a 1932 bronze bust of Anne Evans by Arnold Rönnebeck, who was, coincidentally, the director of the Denver Art Museum from 1926 to 1930. — Ray Mark Rinaldi, Denver Post, 5 Oct. 2026

During a 2016 trip abroad, family members coincidentally met a former Arizona state senator who mentioned the possibility of using a forensic technique called familial DNA. — Megan Fahrney, ABC News, 2 Oct. 2026

Word History

Etymology

coincidental + -ly entry 2

First Known Use

1837, in the meaning defined at sense 1

Rhymes for coincidentally

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