Definition of "callousness" [cal•lous•ness]

• The quality of being callous; emotional hardheartedness or indifference. (noun)

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• "Until that time when the meaning of it all shall flash out upon the world, the race will be hidebound in callousness and in faint-hearted melancholy."
• "They have compounded their original sin -- callousness in handing over kiddies to aliens -- by hiding it."
• "There are orders of magnitude difference in callousness between the first two groups, and as between us and the third group the differences may be entirely philosophical."