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

Perhaps not coincidentally, Alabama also had the highest denial rates for in-network claims by insurers on the individual marketplace in 2023, according to a KFF analysis: 34%. —Alana Semuels, Time, 15 July 2025

William Ball also owned the popular Huddle Restaurant chain and the Embers Supper Club at 2034 N. Meridan St. Not so coincidentally, after Ball's involvement, Huddle Restaurants were typically connected to suburban Indianapolis Haag Drugs. —Indianapolis Star, IndyStar, 2 July 2025

Both picks, coincidentally, would be perfect for your next trip to the beach. —Jake Henry Smith, Glamour, 4 July 2025

Did the country create a new army and coincidentally give it the same name? —Amy Nicholson, Los Angeles Times, 1 July 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