substitution cipher

noun

Definition of substitution cipher 

: a cipher in which the letters of the plaintext are systematically replaced by substitute letters — compare transposition cipher

First Known Use of substitution cipher

1936, in the meaning defined above

Keep scrolling for more

Learn More about substitution cipher

Share substitution cipher

Statistics for substitution cipher

Look-up Popularity

Time Traveler for substitution cipher

The first known use of substitution cipher was in 1936

See more words from the same year

More from Merriam-Webster on substitution cipher

Britannica.com: Encyclopedia article about substitution cipher

Comments on substitution cipher

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

WORD OF THE DAY

one that holds something together

Get Word of the Day daily email!

Test Your Vocabulary

Words from Greek and Roman Mythology Quiz

  • the-triumph-of-venus-by-alessandro-magnasco
  • Boreal comes from the name of the ancient Greek god of which wind?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
Syn City

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

TAKE THE QUIZ

Love words? Need even more definitions?

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