: an acute contagious febrile disease of humans that is caused by a poxvirus (Orthopoxvirus variola), is characterized by a skin eruption with pustules, sloughing, and scar formation, and has been eradicated globally by widespread vaccination

called also variola

Examples of smallpox in a Sentence

Recent Examples on the Web
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Over the next 60 years, polio, measles, rubella, smallpox and other illnesses nearly vanished. Dr. Marianne Parshley, Hartford Courant, 10 Aug. 2026 This is a sector that’s helped solve civilizational challenges like eradicating smallpox and lifting more than a billion people out of extreme poverty. Max Simkoff, Fortune, 7 Aug. 2026 While smallpox is no longer a daily concern, the latest DNA discoveries can help public health officials, biologists, and epidemiologists prepare for and fight future disease outbreaks. Andrew Paul, Popular Science, 30 July 2026 The now extinct lineage branched off after medieval European strains but before those that gave rise to modern smallpox. Sam MacDonald, Scientific American, 30 July 2026 See All Example Sentences for smallpox

Word History

First Known Use

circa 1562, in the meaning defined above

Time Traveler
The first known use of smallpox was circa 1562

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Cite this Entry

“Smallpox.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/smallpox. Accessed 12 Aug. 2026.

Kids Definition

: a sometimes deadly disease that is caused by a virus, is characterized by fever and a skin rash, and is believed to have been wiped out worldwide as a result of vaccination

Medical Definition

: an acute contagious febrile disease of humans that is caused by a poxvirus (Orthopoxvirus variola), is characterized by skin eruption with pustules, sloughing, and scar formation, and has been eradicated globally by widespread vaccination

called also variola

see variola major, variola minor

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