immune system
noun
: the bodily system that protects the body from foreign substances, cells, and tissues by producing the immune response and that includes especially the thymus, spleen, lymph nodes, special deposits of lymphoid tissue (as in the gastrointestinal tract and bone marrow), macrophages, lymphocytes including the B cells and T cells, and antibodies
Examples of immune system in a Sentence
Recent Examples on the Web
The Digital Immune System As AI becomes more embedded in security operations, the immune system analogy grows even sharper.
—
Abhik Biswas,
Forbes.com,
2 July 2026
If successful, the experimental therapy could deliver an immune rejuvenation breakthrough – one that bolsters the immune system rather than targeting a specific pathogen or disease.
—
New Atlas,
2 July 2026
Kombucha is packed with vitamins, which can help strengthen the immune system and manage diabetes risk.
—
Embry Roberts,
Martha Stewart,
2 July 2026
What to look for Salmonella is a foodborne illness that can be fatal to young children, pregnant women, older adults and people with weakened immune systems, according to the National Institutes of Health.
—
Summer Lin,
Los Angeles Times,
2 July 2026
See All Example Sentences for immune system
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.
Abhik Biswas,
Forbes.com,
2 July 2026
If successful, the experimental therapy could deliver an immune rejuvenation breakthrough – one that bolsters the immune system rather than targeting a specific pathogen or disease.
—
New Atlas,
2 July 2026
Kombucha is packed with vitamins, which can help strengthen the immune system and manage diabetes risk.
—
Embry Roberts,
Martha Stewart,
2 July 2026
What to look for Salmonella is a foodborne illness that can be fatal to young children, pregnant women, older adults and people with weakened immune systems, according to the National Institutes of Health.
—
Summer Lin,
Los Angeles Times,
2 July 2026
See All Example Sentences for immune system
Cite this Entry
“Immune system.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/immune%20system. Accessed 5 Jul. 2026.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
