as in spreading
exciting a similar feeling or reaction in others
an infectious giggle that got the whole class laughing
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Recent Examples of infectious
There’s plenty of profit to be made off the infectious enthusiasm for the game and the frills that the flush player can furnish their setup with, but while the new crop of mahj-centric entrepreneurs are gaining, is anyone losing?
—
Kase Wickman, Vanity Fair, 10 Mar. 2026
There’s infectious joy and wonder as the Eridian who will come to be known as Rocky begins communicating with Ryland, at first with rudimentary signals and then with more complex language once Ryland rigs a translation device.
—David Rooney, HollywoodReporter, 10 Mar. 2026
The laughing becomes infectious.
—Omar L. Gallaga, Los Angeles Times, 8 Mar. 2026
Many diseases are more infectious and more lethal than COVID-19 was, and the next such pandemic could prove to be our species’ undoing.
—Big Think, 4 Mar. 2026
See All Example Sentences for infectious
Kase Wickman, Vanity Fair, 10 Mar. 2026
There’s infectious joy and wonder as the Eridian who will come to be known as Rocky begins communicating with Ryland, at first with rudimentary signals and then with more complex language once Ryland rigs a translation device.
—David Rooney, HollywoodReporter, 10 Mar. 2026
The laughing becomes infectious.
—Omar L. Gallaga, Los Angeles Times, 8 Mar. 2026
Many diseases are more infectious and more lethal than COVID-19 was, and the next such pandemic could prove to be our species’ undoing.
—Big Think, 4 Mar. 2026
See All Example Sentences for infectious
Recent Examples of Synonyms for infectious
catching
Adjective
-
MacIver, who got 33 games of experience last year with the A’s, will likely be the Rangers’ third catching option this season behind Kyle Higashioka and Danny Jansen.—
Evan Grant,
Dallas Morning News,
13 Feb. 2026
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With that much catching experience, he was bound to be a manager, and he’s been working with Rockies prospects in the low minors for 10 years.—
Dom Amore,
Hartford Courant,
4 Feb. 2026
Cite this Entry
“Infectious.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/infectious. Accessed 21 Mar. 2026.
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