keying sequence


Definition of keying sequence

: a sequence of numbers or letters that enciphers or deciphers a polyalphabetic substitution cipher letter by letter

Love words?

You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

  • More than 250,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

History and Etymology for keying sequence

from present participle of key entry 2

Keep scrolling for more

Learn More about keying sequence

Statistics for keying sequence

Cite this Entry

“Keying sequence.” Dictionary, Merriam-Webster, Accessed 11 Aug. 2020.

Comments on keying sequence

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


Test Your Vocabulary

Original Meanings Quiz

  • rembrandt painting a young scholar and his tutor
  • Which of the following is the earliest known sense of the word awe?
Spell It

Can you spell these 10 commonly misspelled words?

Syn City

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!