infectious

adjective

in-ˈfek-shəs How to pronounce infectious (audio)
Definition of infectiousnext
as in spreading
exciting a similar feeling or reaction in others an infectious giggle that got the whole class laughing

Synonyms & Similar Words

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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 songs on Night Ripper briefly imagine surreal all-star jams, like Elton John with Dave Grohl and Biggie Smalls, before one instantly recognizable sample drops out and is replaced by another, over and over with infectious momentum. — Al Shipley, SPIN, 29 June 2026 Growth was infectious; the founder wanted to impact as many children as possible, launching a massive new project every year. — Janine Schindler, Forbes.com, 26 June 2026 An uncontrollable laugh when tickled is vastly different from a polite laugh in a meeting, an infectious laugh during a movie, or a nervous little giggle after making a mistake. — Laura Baisas, Popular Science, 25 June 2026 His love for his work was infectious. — Guy Davies, ABC News, 25 June 2026 See All Example Sentences for infectious
Recent Examples of Synonyms for infectious
catching
Adjective
  • Instead, the Giants are making an even more shocking decision to ship Bailey, who will be eligible for arbitration for the first time this offseason, to the Guardians, who have their own crowded catching room between Bo Naylor and Austin Hedges.
    — Justice delos Santos, Mercury News, 9 May 2026
  • Christian Vázquez, who replaced Diaz in the lineup Monday, figures to take on primary catching duties while Diaz is out.
    — Matt Kawahara, Houston Chronicle, 4 May 2026
Definition of catching

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infection
infectious
infective
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Cite this Entry

“Infectious.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/infectious. Accessed 16 Jul. 2026.

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More from Merriam-Webster on infectious

Nglish: Translation of infectious for Spanish Speakers

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