hexa·dec·i·mal | \ˌhek-sə-ˈdes-məl, -ˈde-sə-\

Definition of hexadecimal 

: of, relating to, or being a number system with a base of 16

Keep scrolling for more

Other Words from hexadecimal

hexadecimal noun

Examples of hexadecimal in a Sentence

Recent Examples on the Web

Decryption relies on a hardcoded 32-byte ASCII hexadecimal alphabet key. Dan Goodin, Ars Technica, "Hackers who sabotaged the Olympic games return for more mischief," 19 June 2018 While the messages are stored in hexadecimal format as a binary property list (plist), the data can easily be converted back to plain text. Sean Gallagher, Ars Technica, "Signal’s “disappearing messages” live on in macOS notifications," 9 May 2018

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

First Known Use of hexadecimal

1954, in the meaning defined above

Keep scrolling for more

Learn More about hexadecimal

Share hexadecimal

Statistics for hexadecimal

Look-up Popularity

Time Traveler for hexadecimal

The first known use of hexadecimal was in 1954

See more words from the same year

Comments on hexadecimal

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


a generally accepted meaning of a word

Get Word of the Day daily email!

Test Your Vocabulary

Great Scrabble Words—A Quiz

  • scrabble-tiles-that-read-scrabble-quiz
  • Which of the following Q-without-U words means the number five in cards or dice?
True or False

Test your knowledge - and maybe learn something along the way.


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!