English Pronunciation enPR: mĭsʹt(ə)rēz, IPA(key): /ˈmɪst(ə)ɹiz/ Audio (US):(file) Hyphenation: mys‧te‧ries Noun mysteries plural of mystery Noun mysteries pl (plural only) (Ancient Greece, Ancient Rome, religion) a number of secret societies or cults Anagrams tyremesis Dutch Pronunciation Audio:(file) Noun mysteries plural of mysterie Middle English Noun mysteries plural of mysterie (“mystery”)Wikiwand - on Seamless Wikipedia browsing. On steroids.