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: a disease of the human immune system that is characterized cytologically especially by reduction in the numbers of CD4-bearing helper T cells to 20 percent or less of normal thereby rendering the subject highly vulnerable to life-threatening conditions (such as Pneumocystis carinii pneumonia) and to some (such as Kaposi's sarcoma) that become life-threatening and that is caused by infection with HIV commonly transmitted in infected blood especially during illicit intravenous drug use and in bodily secretions (such as semen) during sexual intercourse
Examples of AIDS in a Sentence
Recent Examples on the Web
But the approval of effective HIV treatment in 1996 reduced the public’s fear of AIDS.
—Benjamin Ryan, NBC News, 12 Nov. 2024
That measure would limit how certain healthcare providers spend revenues from a federal prescription drug program, with the most obvious target being the AIDS Healthcare Foundation.
—Andrew Khouri, Los Angeles Times, 6 Nov. 2024
His administration also banned people with HIV from military deployment, disbanded the Presidential Advisory Council on HIV/AIDS, and slashed global funding for HIV prevention and treatment.
—Nico Lang, Them, 6 Nov. 2024
This would only apply to the AIDS Healthcare Foundation, limiting the group's ability to fund ballot initiatives in future elections.
—Thomas G. Moukawsher, Newsweek, 6 Nov. 2024
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Word History
Etymology
acquired immunodeficiency syndrome
First Known Use
1982, in the meaning defined above
Phrases Containing AIDS
Dictionary Entries Near AIDS
Cite this Entry
“AIDS.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/AIDS. Accessed 30 Nov. 2024.
Kids Definition
AIDS
noun
: a serious disease of the human immune system marked by destruction of a large proportion of the helper T cells in the body due to infection by the HIV virus commonly transmitted especially in blood and semen
Medical Definition
AIDS
noun
: a disease of the human immune system that is characterized cytologically especially by a reduction in the numbers of CD4-bearing helper T cells to 20 percent or less of normal thereby rendering the subject highly vulnerable to life-threatening conditions (as Pneumocystis carinii pneumonia) and to some that become life threatening (as Kaposi's sarcoma) and that is caused by infection with HIV commonly transmitted in infected blood especially during illicit intravenous drug use and in bodily secretions (as semen) during sexual intercourse
called also acquired immune deficiency syndrome, acquired immunodeficiency syndrome
More from Merriam-Webster on AIDS
Britannica.com: Encyclopedia article about AIDS
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