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

Some Jimmy Kimmel fans who opened Hulu to watch the late-night host's return to TV were coincidentally met with a notice that their subscription cost will soon be increasing. —Melina Khan, USA Today, 24 Sep. 2025

The cast is expected to include Meryl Streep (who, coincidentally, is Ronson’s mother-in-law; the musician is married to Streep’s daughter Grace Gummer), Daniel Craig, Emma Mackey and Carey Mulligan. —Steven J. Horowitz, Variety, 23 Sep. 2025

Both, coincidentally, eventually yielded touchdown drives. —Alex Zietlow, Charlotte Observer, 21 Sep. 2025

The circumstances of both of their crownings are coincidentally similar. —Tabitha Parent, PEOPLE, 17 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