sickly
Americanadjective
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not strong; unhealthy; ailing.
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of, connected with, or arising from ill health.
a sickly complexion.
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marked by the prevalence of ill health, as a region.
the epidemic left the town sickly.
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causing sickness.
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maudlin and insipid; mawkish.
sickly sentimentality.
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faint or feeble, as light or color.
adverb
verb (used with object)
adjective
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disposed to frequent ailments; not healthy; weak
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of, relating to, or caused by sickness
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(of a smell, taste, etc) causing revulsion or nausea
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(of light or colour) faint or feeble
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mawkish; insipid
sickly affectation
adverb
Other Word Forms
- sickliness noun
Etymology
Origin of sickly
1300–50; Middle English siklich, sekly (adj.). See sick 1, -ly
Explanation
If you're frequently ill, or often under the weather, you're sickly. A sickly child tends to miss a lot of school. Sickly people aren't in perfect health — they are prone to coming down with illnesses, or they just generally don't feel well. You can also describe someone as appearing sickly, if their faces are pale and unhealthy-looking. This "habitually ailing" meaning dates from the fourteenth century, and for a brief time it was also used to mean "causing illness."
Vocabulary lists containing sickly
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Leo Damrosch traces Stevenson’s life from sickly student in 19th-century Edinburgh through his enormous literary success—a career characterized by a joyfully industrious work ethic, a love of travel and a sparkling, warm wit.
From The Wall Street Journal • Dec. 3, 2025
Smith was a sickly child, contracting bronchial pneumonia, tuberculosis, German measles, mumps and chicken pox which kept her in "periods of lengthy bed rest".
From BBC • Nov. 4, 2025
Even before ICE got him, he had been sickly.
From Slate • Oct. 27, 2025
Garrett then takes one major step further, looking at the sickly side of modernity through the lens of the MeToo movement.
From Salon • Sep. 25, 2025
“Don’t you think that can of worms is open now, Gloria? Yes, your gram was a sickly child, Emma.”
From "How to Disappear Completely" by Ali Standish
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
