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
His obituary remembered his infectious laughter and gentle spirit, noting his kindness, genuineness, and reliability.
—
Steven Rosenbaum, CBS News, 28 May 2026
In theory, yes — just as infectious travelers have crossed borders during nearly every outbreak in modern history.
—Krutika Kuppalli, STAT, 28 May 2026
The nine-episode drama sci-fi series follows Carol (Rhea Seehorn), a pessimistic woman who must try to save the world from an infectious virus when a mysterious alien collective possesses human bodies and their consciousness on a global scale.
—Destiny Jackson, Deadline, 26 May 2026
There’s nothing more infectious than sitting and laughing in a theater with a bunch of people with different age ranges and backgrounds.
—Marlow Stern, Variety, 25 May 2026
See All Example Sentences for infectious
Steven Rosenbaum, CBS News, 28 May 2026
In theory, yes — just as infectious travelers have crossed borders during nearly every outbreak in modern history.
—Krutika Kuppalli, STAT, 28 May 2026
The nine-episode drama sci-fi series follows Carol (Rhea Seehorn), a pessimistic woman who must try to save the world from an infectious virus when a mysterious alien collective possesses human bodies and their consciousness on a global scale.
—Destiny Jackson, Deadline, 26 May 2026
There’s nothing more infectious than sitting and laughing in a theater with a bunch of people with different age ranges and backgrounds.
—Marlow Stern, Variety, 25 May 2026
See All Example Sentences for infectious
Recent Examples of Synonyms for infectious
catching
Adjective
-
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
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The Braves gained four years and millions of dollars by substituting Olson for Freeman at first base – even though one of those traded was slugging catching prospect Shea Langeliers.—
Dan Schlossberg,
Forbes.com,
15 Apr. 2026
Cite this Entry
“Infectious.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/infectious. Accessed 6 Jun. 2026.
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