as in spreading
exciting a similar feeling or reaction in others
an infectious giggle that got the whole class laughing
Synonyms & Similar Words
Relevance
Example Sentences
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
Recent Examples of infectious
Some adaptations to infectious pathogens came at a cost, however: strengthening resistance to ancient diseases might have elevated the likelihood of immune overreaction.
—
Kermit Pattison, Scientific American, 20 May 2025
There are also infectious Saturday Night Live-like moments when an actor visible struggles to stay in character when a joke is really working.
—James Hibberd, HollywoodReporter, 9 May 2025
The measles patient was not infectious while traveling, health officials said, but some people may have been exposed to the virus in healthcare facilities.
—Rong-Gong Lin Ii, Los Angeles Times, 7 May 2025
Measles is so infectious that 95% of the population must be vaccinated to protect the community, a concept called herd immunity.
—Rebecca Schein, The Conversation, 7 May 2025
See All Example Sentences for infectious
Kermit Pattison, Scientific American, 20 May 2025
There are also infectious Saturday Night Live-like moments when an actor visible struggles to stay in character when a joke is really working.
—James Hibberd, HollywoodReporter, 9 May 2025
The measles patient was not infectious while traveling, health officials said, but some people may have been exposed to the virus in healthcare facilities.
—Rong-Gong Lin Ii, Los Angeles Times, 7 May 2025
Measles is so infectious that 95% of the population must be vaccinated to protect the community, a concept called herd immunity.
—Rebecca Schein, The Conversation, 7 May 2025
See All Example Sentences for infectious
Recent Examples of Synonyms for infectious
catching
Adjective
-
Tinkering with the high-IQ catching tandem of Martin Maldonado and Elias Dias may not jibe with the team’s emphasis on run prevention.—
Tom Krasovic,
San Diego Union-Tribune,
18 May 2025
-
In Stephenson’s absence, the Reds’ catching duo of Jose Trevino and Austin Wynns has combined to hit .347/.391/.594 with eight home runs.—
C. Trent Rosecrans,
New York Times,
2 May 2025
Cite this Entry
“Infectious.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/infectious. Accessed 3 Jun. 2025.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
Share