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norovirus

American

[nawr-oh-vahy-ruhs] / ˈnɔr oʊˌvaɪ rəs /

noun

any of various single-stranded RNA viruses of the genus Norovirus, of the family Caliciviridae: the most common cause of epidemic viral gastroenteritis in humans.

norovirus British

/ ˈnɔːrəʊˌvaɪrəs /

noun

a virus which is a common cause of gastroenteritis

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

Inflected Forms

noun

noroviruses

plural

Etymology

Origin of norovirus

1970–75; < Nor(walk) virus (with connective -o- )

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.

For example, in the case of the cruise with norovirus, the French authorities temporarily prevented anyone from getting off the ship, leaving passengers trapped on the vessel with norovirus.

From Slate • May 16, 2026

Cruises more commonly contend with illnesses like norovirus, which accounts for more than 90% of diarrheal illnesses reported onboard, according to the CDC.

From The Wall Street Journal • May 9, 2026

He caught the norovirus off me and had to cancel two of his tour dates.

From BBC • Mar. 13, 2026

Some seafood products sold to California businesses were recalled this week over concerns they may be contaminated with the highly contagious norovirus, according to the U.S.

From Los Angeles Times • Mar. 10, 2026

Like, when Anna got the norovirus last year, Morgan and I reenacted the fight she missed in the lunchroom.

From "Leah on the Offbeat" by Becky Albertalli

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023