Qualitative Concept
hardness Audio
hard·ness [ hahrd-nis ]
Definitions related to hardness:
  • (hard) Solid and firm to the touch; unyielding to pressure.
    NCI
    U.S. National Cancer Institute, 2021
  • Quality of firmness produced by cohesion of the particles composing a substance, observed by its inflexibility or resistance to indentation or distortion.
    CRISP Thesaurus
    National Institutes of Health, 2006
  • The mechanical property of material that determines its resistance to force. HARDNESS TESTS measure this property.
    NLM Medical Subject Headings
    U.S. National Library of Medicine, 2025
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This content should not be used in place of medically-reviewed decision support reference material or professional medical advice. Some terms may have alternate or updated definitions not reflected in this set. The definitions on this page should not be considered complete or up to date.