Phrase guide

Caesar cipher

noun · 1 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.

  • US: /ˈsizəɹ ˈsaɪfər/
  • US: Recorded audio is listed in the source snapshot.
  • rhymes with -aɪfə(ɹ)

1

noun

Meaning 1

A simple form of encryption in which each letter in the plaintext is shifted through the alphabet a number of positions (for example A→D, B→E, C→F, etc.).

Definition source: English Wiktionary via Wiktextract

Topics: computing, cryptography, engineering, mathematics, natural-sciences, physical-sciences, sciences

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: Julius Caesar cipher

Antonyms: none provided

Broader terms: substitution cipher

History

Etymology

From its supposed use by Julius Caesar to communicate with his generals.

Across languages

Translations

4 source translations are retained for this English entry.

  • Hungarian: Caesar-rejtjel — simple form of encryption
  • Icelandic: reiknirit Sesars — simple form of encryption
  • Polish: szyfr Cezara — simple form of encryption
  • Russian: шифр Це́заря (šifr Cézarja) — simple form of encryption