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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Recent Examples of infectious
Zara Larsson’s Midnight Sun came out in September last year—now, seven months later, the infectious pop album has everyone gearing up for a hot girl summer.
—
Christian Allaire, Vogue, 21 Apr. 2026
His infectious personality provides a crucial morale boost during the tense playoff stretch, with teammates emphasizing how much his off-court presence means to the team’s performance.
—Broderick Turner, Los Angeles Times, 20 Apr. 2026
Measles is a highly contagious disease that is spread easily through the air when an infectious person breathes, coughs, or sneezes, according to the Maryland Health Department.
—Adam Thompson, CBS News, 19 Apr. 2026
What is present, however, is a clear and infectious love of life and music.
—Chris Barilla, PEOPLE, 17 Apr. 2026
See All Example Sentences for infectious
Christian Allaire, Vogue, 21 Apr. 2026
His infectious personality provides a crucial morale boost during the tense playoff stretch, with teammates emphasizing how much his off-court presence means to the team’s performance.
—Broderick Turner, Los Angeles Times, 20 Apr. 2026
Measles is a highly contagious disease that is spread easily through the air when an infectious person breathes, coughs, or sneezes, according to the Maryland Health Department.
—Adam Thompson, CBS News, 19 Apr. 2026
What is present, however, is a clear and infectious love of life and music.
—Chris Barilla, PEOPLE, 17 Apr. 2026
See All Example Sentences for infectious
Recent Examples of Synonyms for infectious
catching
Adjective
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The designs are eye catching and beautiful, inspired by South Florida's beaches and ocean water.—
Najahe Sherman,
CBS News,
14 Apr. 2026
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In the snaps, Hemsworth can be seen catching waves alongside his twin sons, Sasha and Tristan, 12, as well as cliff jumping and spending time with some friends by the water.—
Georgia Slater,
PEOPLE,
8 Apr. 2026
Cite this Entry
“Infectious.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/infectious. Accessed 1 May. 2026.
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