noun (n)

• the physical property of being inflexible and hard to bend(noun.attribute)

  source: wordnet30
• the property of moving with pain or difficulty(noun.attribute)

  Example:
  He awoke with a painful stiffness in his neck.
  

  source: wordnet30
• firm resoluteness in purpose or opinion or action(noun.attribute)

  Example:
  A charming host without any touch of stiffness or pomposity.
  

  source: wordnet30
• the inelegance of someone stiff and unrelaxed (as by embarrassment)(noun.attribute)

  Synonym:
  awkwardness, clumsiness, gracelessness
  

  source: wordnet30
• excessive sternness(noun.attribute)

  Synonym:
  hardness, harshness, inclemency, rigor, rigorousness, rigour, rigourousness, severeness, severity
  

  source: wordnet30
• The quality or state of being stiff; as, the stiffness of cloth or of paste; stiffness of manner; stiffness of character.(noun)

  source: webster1913