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.
Yet, instead of seizing this opportunity, the United States is retreating from its global leadership role in infectious disease control. William A. Haseltine, Forbes.com, 9 Apr. 2025 But infectious disease clinician-scientist Dr. Neil Stone welcomed Kennedy's comments. David Oliver, USA Today, 9 Apr. 2025 Colorado Attorney General Phil Weiser warned the state could lose more than $229 million for public health programs — including immunization distribution and training for local public health agencies focused on infectious disease surveillance. Alayna Alvarez, Axios, 9 Apr. 2025 Violent crime has been down, air travel is as safe as it’s ever been, mortality from infectious disease largely fell throughout the 20th and 21st centuries (even the impact of the Covid-19 pandemic was blunted by the swift development of effective vaccines). Allie Volpe, Vox, 3 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 16 Apr. 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
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!