Definition of "sickliness"

sickliness

noun
usually uncountable, plural sicklinesses
1. The state or characteristic of weakness, incapacity, or physical distress due to poor health, especially of a chronic nature.
  Quotations
  I do beseech your majesty, impute his wordsTo wayward sickliness and age in him.
  1595 December 9 (first known performance), William Shakespeare, “The life and death of King Richard the Second”, in Mr. William Shakespeares Comedies, Histories, & Tragedies: Published According to the True Originall Copies (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, [Act 2, scene 1]
  Gradually it gave place to a smile; a feeble, helpless, melancholy smile; bland, almost to sickliness.
  1842 December – 1844 July, Charles Dickens, chapter 9, in The Life and Adventures of Martin Chuzzlewit, London: Chapman and Hall, […], published 1844
  My devotions were disturbed with a feeling of languor and sickliness, and the tormenting fear of its becoming worse: and a depressing headache was generally my companion throughout the day.
  1847 December, Acton Bell [pseudonym; Anne Brontë], chapter 7, in Agnes Grey. […], London: Thomas Cautley Newby, […]