Definition of "mysteriousness" [mys•te•ri•ous•ness]

• The quality of being mysterious. (noun)

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• "The mysteriousness is the point, what makes it koan-like."
• "I may be able to very soon, and clear up all this mysteriousness, that is worrying me so."
• "This sort of mysteriousness, which is always so becoming in a hero, threw a fresh grace in Catherine's imagination around his person and manners, and increased her anxiety to know more of him."