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Synonyms

illness

American  
[il-nis] / ˈɪl nɪs /

noun

  1. poor health; sickness.

    He grew up in an environment known for poverty, illness, and little opportunity for education.

  2. a specific sickness or disease, or an instance of such.

    Please be as accurate as possible in listing your childhood illnesses.

    Synonyms:
    infirmity, affliction, ailment
  3. Obsolete. wickedness.


illness British  
/ ˈɪlnɪs /

noun

  1. a disease or indisposition; sickness

  2. a state of ill health

  3. obsolete wickedness

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Usage

What does illness mean? Illness is a state of poor health or sickness, as in I’ve had to miss a lot of work due to illness.The word illness is also commonly used to refer to a disease or instance of sickness.This sense of the word is often used when the type of disease is uncertain or unknown or when someone doesn’t want to specify what it is, as in They said that he is in the hospital with an illness, but they didn’t provide any further details. The word illness is based on the adjective ill, meaning sick.Example: The best way to avoid illness is to thoroughly wash your hands.

Etymology

Origin of illness

First recorded in 1490–1500; ill + -ness

Compare meaning

How does illness compare to similar and commonly confused words? Explore the most common comparisons: