ac·​ci·​dent·​al·​ly | \ ˌak-sə-ˈdent-lē How to pronounce accidentally (audio) , -ˈden-tᵊl-ē How to pronounce accidentally (audio) \

Definition of accidentally

: in an accidental or unintended manner : by accident I accidentally deleted the file. The lock prevents the gate from opening accidentally. Six lionfish were accidentally released from a home aquarium in Biscayne Bay, Fla., during Hurricane Andrew in 1992.— Alcestis Cooky Oberg The Olympic test was thrown out after the test lab accidentally destroyed the backup sample … that's required to confirm a positive result.— Christie Aschwanden He bumped into her accidentally on purpose. [=he bumped into her intentionally but he tried to make it appear to be an accident]

First Known Use of accidentally

14th century, in the meaning defined above

Keep scrolling for more

Learn More About accidentally

Time Traveler for accidentally

Time Traveler

The first known use of accidentally was in the 14th century

See more words from the same century

Dictionary Entries Near accidentally



accidental means

See More Nearby Entries 

Statistics for accidentally

Cite this Entry

“Accidentally.” Dictionary, Merriam-Webster, Accessed 25 Oct. 2021.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon


Test Your Vocabulary

Difficult Spelling Words Quiz

  • alphabet pasta spelling help
  • Which is the correct spelling?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!