AIDS

noun

: 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
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.
By the ’90s, as the AIDS epidemic devastated precisely the artistic and LGBT+ communities that made up Atlas’s milieu, much of his work became forged by a sense of loss, danger, and violence. Beatrice Loayza, ARTnews.com, 6 Feb. 2025 President Cyril Ramaphosa of South Africa said his country had not seized land and that other than a program to battle H.I.V. and AIDS, South Africa receives no funding from the United States. Karen Yourish, New York Times, 6 Feb. 2025 The network has previously worked with groups like The CHANGE Agenda and the International AIDS Society to distribute information and increase access to healthcare, especially among LGBTQ+ youth. Samantha Riedel, Them, 5 Feb. 2025 Other Trump critics are worried about the humanitarian impact of cutting aid programs—Newsweek has reported on an AIDS foundation's estimation that more than 100,000 babies could be born with HIV as a result of Trump's freeze. Thomas G. Moukawsher, Newsweek, 5 Feb. 2025 See all Example Sentences for AIDS 

Word History

Etymology

acquired immunodeficiency syndrome

First Known Use

1982, in the meaning defined above

Time Traveler
The first known use of AIDS was in 1982

Cite this Entry

“AIDS.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/AIDS. Accessed 9 Feb. 2025.

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

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