1
: any of several diseases characterized by skin lesions
2
Lupus astronomy : a southern constellation that is visible between the constellations of Scorpius and Centaurus and that is represented by the figure of a wolf
Above Lupus lies Scorpius, one of the few constellations whose star pattern actually suggests the object that it is named for. In the myths, the scorpion was assigned by Artemis, the hunting goddess, to kill Orion, far across the sky.Don Moser

Examples of lupus in a Sentence

Recent Examples on the Web
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Shortly after she was diagnosed with class 3 lupus nephritis, a serious complication in which lupus attacks the kidneys. Toria Sheffield, PEOPLE, 1 Aug. 2026 Resident Yvette Lopez, who has lupus, has been carting over water from a friend. Elijah Westbrook, CBS News, 30 July 2026 People older than 60 are most at risk, or those with weakened immune systems and chronic conditions like cancer, lupus and multiple sclerosis. Grant Stringer, Mercury News, 29 July 2026 Illnesses like lupus, inflammatory bowel disease and others have been added to the list of qualifying conditions as well. Will Yakowicz, Forbes.com, 17 July 2026 See All Example Sentences for lupus

Word History

Etymology

Middle English, from Medieval Latin, from Latin, wolf

First Known Use

14th century, in the meaning defined at sense 1

Time Traveler
The first known use of lupus was in the 14th century

Cite this Entry

“Lupus.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/lupus. Accessed 5 Aug. 2026.

Medical Definition

: any of several diseases (as lupus vulgaris or systemic lupus erythematosus) characterized by skin lesions
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