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
The comprehensive report out of the US Centers for Disease Control and Prevention (CDC) highlights the value of long-term research into the epidemiology of infectious illnesses that had, up to a certain point, remained rare and stable.
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New Atlas, 8 Apr. 2025
The virus is transmitted by contact with infectious droplets or by breathing the air an infected person breathed, coughed or sneezed in.
—Sara Moniuszko, CBS News, 8 Apr. 2025
Two Lutherville Laboratory Elementary School students killed in a highway crash Saturday are being remembered by family, friends and the school community as bright, joyful children with infectious personalities.
—Todd Karpovich, Baltimore Sun, 8 Apr. 2025
His endearing personality was infectious and unforgettable.
—Gordon G. Chang, MSNBC Newsweek, 8 Apr. 2025
See All Example Sentences for infectious
New Atlas, 8 Apr. 2025
The virus is transmitted by contact with infectious droplets or by breathing the air an infected person breathed, coughed or sneezed in.
—Sara Moniuszko, CBS News, 8 Apr. 2025
Two Lutherville Laboratory Elementary School students killed in a highway crash Saturday are being remembered by family, friends and the school community as bright, joyful children with infectious personalities.
—Todd Karpovich, Baltimore Sun, 8 Apr. 2025
His endearing personality was infectious and unforgettable.
—Gordon G. Chang, MSNBC Newsweek, 8 Apr. 2025
See All Example Sentences for infectious
Cite this Entry
“Infectious.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/infectious. Accessed 23 Apr. 2025.
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