Mithraism

noun

Mith·​ra·​ism ˈmi-thrə-ˌi-zəm How to pronounce Mithraism (audio)
-(ˌ)thrā-
plural -s
: a mystery cult of Iranian origin having as its deity Mithras, the savior hero of Persian myth, admitting only men to its seven degrees of initiation, and flourishing in the late Roman empire

Word History

Etymology

Mithras, Persian god of light (from Latin, from Greek) + English -ism

The Ultimate Dictionary Awaits

Expand your vocabulary and dive deeper into language with Merriam-Webster Unabridged.

  1. Expanded definitions
  2. Detailed etymologies
  3. Advanced search tools
  4. All ad-free

Discover what makes Merriam-Webster Unabridged the essential choice for true word lovers.

Start Your Free Trial Now

Browse Nearby Words

Cite this Entry

“Mithraism.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Mithraism. Accessed 16 Dec. 2025.

Love words? Need even more definitions?

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