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

Belichick was the coach on this year’s ballot, while, coincidentally, Patriots owner Robert Kraft was the contributor nominee. —Scott Thompson, FOXNews.com, 29 Jan. 2026

The young Suwandi studied at Northwestern University, coincidentally under the same teacher as Arden several decades prior. —Joseph States, Chicago Tribune, 26 Jan. 2026

McNealy finished second to Ludvig Åberg at the 2025 Genesis Invitational, coincidentally held at Torrey Pines—after a closing-round 64 vaulted him firmly into contention. —Jeff Goudy, Forbes.com, 26 Jan. 2026

Not coincidentally Miami won its last playoff game — its last to this day — in the 2000 season just as New England’s rise was dawning. —Greg Cote january 26, Miami Herald, 26 Jan. 2026

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