check·​sum | \ ˈchek-ˌsəm How to pronounce checksum (audio) \

Definition of checksum

: a sum derived from the bits of a segment of computer data that is calculated before and after transmission or storage to assure that the data is free from errors or tampering

Examples of checksum in a Sentence

Recent Examples on the Web

By tracking the MD5 checksum, which uniquely identifies the original source of a song, Hoffman said that Emusic would be able to track files that were being made available from one individual to other Napster users. Brad King, WIRED, "Emusic Tracks Napster Naughties," 21 Nov. 2000

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'checksum.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of checksum

1940, in the meaning defined above

Keep scrolling for more

Learn More about checksum

Statistics for checksum

Look-up Popularity

Time Traveler for checksum

The first known use of checksum was in 1940

See more words from the same year

More from Merriam-Webster on checksum

Nglish: Translation of checksum for Spanish Speakers

Comments on checksum

What made you want to look up checksum? Please tell us where you read or heard it (including the quote, if possible).


a device or gadget

Get Word of the Day daily email!

Test Your Vocabulary

Words for Summer: A Quiz

  • a closeup of a sunflower
  • Which of the following words means “of or relating to summer”?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

Word Winder's CrossWinder

Test Your Knowledge - and learn some interesting things along the way.

Love words? Need even more definitions?

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