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norovirus Syllabification: no·ro·vi·rus
Pronunciation: /ˈnôrəˌvīrəs/

Definition of norovirus in English:


1Any of various single-stranded RNA viruses including the Norwalk virus and closely related viruses.
  • Genus Norovirus, family Caliciviridae
Example sentences
  • Nineteen people have submitted stool samples that tested positive for diarrhea-causing agents: Campylobacter (14), norovirus (3), salmonella (1) and Giardia (1).
  • "Real difficulties are caused when norovirus is introduced to closed environments such as hospitals, residential homes or schools."
  • O'Connor noted that the norovirus has many different strains, making it difficult for a person to develop long-lasting immunity to the infection.
1.1Gastroenteritis caused by a norovirus: an outbreak of norovirus aboard the ship infected 350 passengers
More example sentences
  • We know Norovirus is now quite widespread in the community.
  • Winter vomiting disease, or norovirus, is a brief illness, which usually lasts for one to three days.
  • The norovirus is highly contagious, affecting up to one million people in the United Kingdom every year.


Early 21st century: from nor- in Norwalk, Ohio (where an outbreak of gastroenteritis occurred from which the virus was isolated) + -o- + virus.

Definition of norovirus in:

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Word of the day innocuous
Pronunciation: ɪˈnɒkjʊəs
not harmful or offensive