Definition of hardness noun from the Oxford Advanced Learner's Dictionary



    BrE BrE//ˈhɑːdnəs//
    ; NAmE NAmE//ˈhɑːrdnəs//
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  1. 1the quality of being solid, stiff and difficult to bend or break It will soon be possible to design materials that approach the hardness of diamonds. opposite softness
  2. 2the quality of being full of difficulty and problems, especially because of a lack of money synonym toughness I started thinking about the hardness and toughness of life. opposite ease (2)
  3. 3the quality of putting a lot of effort or energy into an activity Others may match her mental hardness; nobody will surpass it.
  4. 4the quality of needing or using a lot of physical strength or mental effort These men enjoy the hardness of the work.
  5. 5the fact of showing no sympathy or affection hardness of heart
  6. 6the quality of being ready to fight and showing no signs of fear or weakness He's honest and forthright, but there is that hardness about him that's needed.
  7. 7the quality of being difficult to do, understand or answer The hardness of the questions varied a lot.
  8. 8the quality in facts of being definitely true and based on evidence that can be proved They want to be sure of the hardness of the data.
  9. 9the quality in water of containing calcium and other mineral salts that make mixing with soap difficult water hardness opposite softness