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
• contemporaneously
• simultaneously
• together

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

The Netherlands was rated the 5th happiest country in the world and is coincidentally the 5th country where money can buy happiness, with a composite score of 78.3. —Kaitlyn McInnis, Forbes.com, 24 June 2025

Alex Goodlett/Getty Images Scheffler, who coincidentally celebrated his 29th birthday on Saturday, sent his tee shot into the rough to the left of the fairway. —Julio Cesar Valdera Morales, MSNBC Newsweek, 21 June 2025

Not coincidentally, those also were the final five starts of Daniel Jones’ Giants career. —Pat Leonard, New York Daily News, 17 June 2025

Diane’s program, coincidentally, will be on San Diego’s bungalow courts. —Eric Duvall, San Diego Union-Tribune, 17 June 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