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
Over the next six years, the show was a stage for Hall’s infectious energy, his antic personality, probing interview style, party atmosphere, his own authenticity and ability to book guests.
—
Rick Kogan, Chicago Tribune, 29 Apr. 2026
Bursting with positivity and infectious energy, Leos are highly entertaining, fun to be around, and have a great knack for finding the bright side of any situation.
—Sophie Flaxman, Better Homes & Gardens, 28 Apr. 2026
Now Pinkeye Is Spreading A separate disease, infectious keratoconjunctivitis — known as IKC, or pinkeye — is now spreading among aoudad in West Texas.
—Hanna Wickes, Charlotte Observer, 27 Apr. 2026
Hernandez said that Stribling has an infectious smile and personality that draws people to him.
—Graham Womack, Sacbee.com, 25 Apr. 2026
See All Example Sentences for infectious
Rick Kogan, Chicago Tribune, 29 Apr. 2026
Bursting with positivity and infectious energy, Leos are highly entertaining, fun to be around, and have a great knack for finding the bright side of any situation.
—Sophie Flaxman, Better Homes & Gardens, 28 Apr. 2026
Now Pinkeye Is Spreading A separate disease, infectious keratoconjunctivitis — known as IKC, or pinkeye — is now spreading among aoudad in West Texas.
—Hanna Wickes, Charlotte Observer, 27 Apr. 2026
Hernandez said that Stribling has an infectious smile and personality that draws people to him.
—Graham Womack, Sacbee.com, 25 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 6 May. 2026.
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