Definition of "Playfair"

Playfair

proper noun
countable and uncountable, plural Playfairs
1. A surname.
2. A placename
  1. A number of craters in Solar System
    A crater in Mars, Solar System
    A crater in Moon, Earth-Moon System, Solar System
noun
countable and uncountable, plural Playfairs
1. (cryptography) Ellipsis of Playfair cipher..
2. (cryptography) an encryption using the Playfair cipher
  Quotations
  Here's a cipher message. Probably Playfair.
  1932, Dorothy Sayers, Have His Carcase‎