immunodeficiency
noun
im·mu·no·de·fi·cien·cy
ˌi-myə-nō-di-ˈfi-shən(t)-sē 
i-ˌmyü-nō-
: inability to produce a normal complement of antibodies or immunologically sensitized T cells especially in response to specific antigens
Examples of immunodeficiency in a Sentence
Recent Examples on the Web
Risk factors for becoming ill include significant underlying medical conditions such as chronic lung disease, kidney disease, diabetes, cancer and immunodeficiency.
—
Katia Hetter, CNN Money, 4 Sep. 2025
Tucked away in cat room at the Ohio Society for the Prevention of Cruelty to Animals (SPCA) and Humane Society in Lima, Dude waits patiently for a home — despite the fact that he’s been diagnosed with a common immune deficiency called feline immunodeficiency virus (FIV).
—Tj MacIas, Kansas City Star, 15 Apr. 2025
Pace said many of the cats are suffering from upper respiratory infections, eye infections and feline leukemia virus or feline immunodeficiency virus.
—Sean Krofssik, Hartford Courant, 3 Apr. 2025
Dominic Rampa, a Las Vegas teenager who has relied on Medicaid to help cover treatments for nine genetic disorders, including two immunodeficiencies and juvenile rheumatoid arthritis, will be attending as a guest of Sen. Jacky Rosen (D, Nev.).
—Nik Popli, TIME, 4 Mar. 2025
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Katia Hetter, CNN Money, 4 Sep. 2025
Tucked away in cat room at the Ohio Society for the Prevention of Cruelty to Animals (SPCA) and Humane Society in Lima, Dude waits patiently for a home — despite the fact that he’s been diagnosed with a common immune deficiency called feline immunodeficiency virus (FIV).
—Tj MacIas, Kansas City Star, 15 Apr. 2025
Pace said many of the cats are suffering from upper respiratory infections, eye infections and feline leukemia virus or feline immunodeficiency virus.
—Sean Krofssik, Hartford Courant, 3 Apr. 2025
Dominic Rampa, a Las Vegas teenager who has relied on Medicaid to help cover treatments for nine genetic disorders, including two immunodeficiencies and juvenile rheumatoid arthritis, will be attending as a guest of Sen. Jacky Rosen (D, Nev.).
—Nik Popli, TIME, 4 Mar. 2025
See All Example Sentences for immunodeficiency
Cite this Entry
“Immunodeficiency.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/immunodeficiency. Accessed 31 Oct. 2025.
Copy CitationKids Definition
immunodeficiency
noun
im·mu·no·de·fi·cien·cy
-də-ˈfish-ən-sē
: inability to produce the normal number of antibodies or T cells capable of acting in an immune system
Medical Definition
immunodeficiency
noun
im·mu·no·de·fi·cien·cy
-di-ˈfish-ən-sē
plural immunodeficiencies
: inability to produce a normal complement of antibodies or immunologically sensitized T cells especially in response to specific antigens see aids
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