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.
The deeply human story of the fight against the world’s deadliest infectious disease. Los Angeles Times, 9 July 2025 The ruling vacates agency policies stemming from a Trump-era executive order targeting information related to LGBTQ+ communities, reproductive care, and infectious disease. Bay City News Service, Mercury News, 6 July 2025 Wyoming is reporting its first measles case in 15 years as the infectious disease continues to spread across the United States. Mary Kekatos, ABC News, 2 July 2025 Experts see ‘major overreach’ Dr. Daniel Griffin, an infectious disease specialist at Columbia University, said the memos reflect wider talking points among health officials. Sarah Owermohle, CNN Money, 2 July 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 19 Jul. 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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