plural sicknesses
1
: unhealthy condition of body or mind : the state of being sick
She missed work due to sickness. [=illness]
2
: a specific type of disease or illness
He died from an unknown sickness.
3
: the feeling you have in your stomach when you think you are going to vomit
The patient complained of sickness [=nausea] and stomach pains.
Cite this Entry
“Sickness.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/sickness. Accessed 20 Jun. 2026.
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