infectious disease

noun

: a disease (such as influenza, malaria, meningitis, rabies, or tetanus) caused by the entrance into the body of pathogenic agents or microorganisms (such as bacteria, viruses, protozoans, or fungi) which grow and multiply there compare communicable disease, contagious disease

Examples of infectious disease in a Sentence

Recent Examples on the Web
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.
Fischer emphasized that measles is the most contagious infectious disease known to humans, even compared to other dangerous diseases like tuberculosis. Mary Kekatos, ABC News, 2 May 2025 Vaccination is the only way to prevent the highly infectious disease that can cause serious health complications or death in some cases. Nicole Brown Chau, CBS News, 1 May 2025 Connolly also pointed out that there were several ongoing outbreaks of infectious disease in the U.S. Sydney Lupkin, NPR, 24 Apr. 2025 Research on childhood cancer, infectious disease outbreaks and how to ease the pain of soldiers wounded on the battlefield would all be affected, Garber added. Tuanh Dam, CNN Money, 22 Apr. 2025 See All Example Sentences for infectious disease

Word History

First Known Use

1600, in the meaning defined above

Time Traveler
The first known use of infectious disease was in 1600

Browse Nearby Words

Cite this Entry

“Infectious disease.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/infectious%20disease. Accessed 10 May. 2025.

Kids Definition

infectious disease

noun
: a disease caused by the presence, growth, and increase in numbers of germs in the body

Medical Definition

infectious disease

noun
: a disease (as influenza, malaria, meningitis, rabies, or tetanus) caused by the entrance into the body of pathogenic agents or microorganisms (as bacteria, viruses, protozoans, or fungi) which grow and multiply there compare communicable disease, contagious disease
Last Updated: - Updated example sentences
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