as in spreading
exciting a similar feeling or reaction in others an infectious giggle that got the whole class laughing

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Example Sentences

Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Recent Examples of infectious The vaccine is made from an inactivated virus, which means the virus is not infectious. Ashley Wong, Health, 8 Oct. 2025 This bioweapon of a virus — known both as the superflu and also by its codename, Captain Trips — is highly infectious, and in short order, the initial outbreak in Arnette, Texas has now spread to every country on Earth. Ethan Siegel, Big Think, 7 Oct. 2025 The latter’s video focused on her seatmate, whose infectious giggles and wheezing breaths—which one commenter joked sounded like the engine—became the soundtrack to the plane fault. Maria Morava, MSNBC Newsweek, 7 Oct. 2025 The Gator spirit is infectious. Skye Sherman, Southern Living, 3 Oct. 2025 See All Example Sentences for infectious
Recent Examples of Synonyms for infectious
catching
Adjective
  • After an early-season injury to Connor Wong, Narváez stepped into the everyday catching role.
    Gabrielle Starr, Boston Herald, 6 Oct. 2025
  • The Twins could also consider internal options with catching/assistant bench coach Hank Conger among them.
    Betsy Helfand, Twin Cities, 1 Oct. 2025

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Cite this Entry

“Infectious.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/infectious. Accessed 22 Oct. 2025.

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