Usually means: Master Chief Petty Officer rank.
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We found 8 dictionaries that define the word MCPO:

General (7 matching dictionaries)
  1. MCPO: Merriam-Webster
  2. MCPO: Oxford Learner's Dictionaries
  3. MCPO: American Heritage Dictionary of the English Language
  4. MCPO: Dictionary.com
  5. MCPO: TheFreeDictionary.com
  6. MCPO: Merriam-Webster
  7. MCPO: Wiktionary

Miscellaneous (1 matching dictionary)
  1. MCPO: Acronym Finder

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Definitions from Wiktionary (MCPO)

▸ noun:  The chemical compound bis[2-(methoxycarbonyl)phenyl] oxalate, mainly used for its chemiluminescent properties.
▸ noun:  Initialism of master chief petty officer. [(US, Navy) A non-commissioned officer in the United States Navy and United States Coast Guard, ranking above senior chief petty officer.]


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