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

Plus, there are 12 shades to choose from, which also coincidentally matches the very affordable price point. —Conçetta Ciarlo, Vogue, 11 Mar. 2026

There are weird tech and conspiracy theories threaded throughout, from Lucy's AI copy of her dead wife to space age biotech to spies who might coincidentally be serial killer victims. —Kelly Lawler, USA Today, 10 Mar. 2026

Álex Rodriguez, coincidentally, was at the White House on Thursday with Trump during a celebration of the MLS champions, Inter Miami. —Paul Sullivan, Chicago Tribune, 8 Mar. 2026

Perhaps not coincidentally, a Kroger Marketplace is right across the street. —Matthew Adams, Fort Worth Star-Telegram, 5 Mar. 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