AIDS

noun

ˈādz 

: 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

In the early years of HIV/AIDS, social stigma and lack of treatment prevented voluntary anonymous testing, while health care providers failed to warn patients in need of transfusions that the public blood supply continued to be unscreened, with the risk of transfusion AIDS. — M. Sara Rosenthal, STAT, 25 June 2026

Shilts made history as the first out gay reporter for the San Francisco Chronicle, and then again with this landmark book about the mishandling of the AIDS crisis in its early days. — Michael Schaub, Oc Register, 25 June 2026

Pretoria has set aside a 750 million rand ($45 million) stopgap allocation to keep clinics open, protect HIV/AIDS treatment, and revive clinical research trials — less than 10% of what Washington used to inject into the system annually. — Tiisetso Motsoeneng, semafor.com, 24 June 2026

Rollerena’s archive, recently published by Reveal Digital as part of its HIV, AIDS, and the Arts collection, records the evolution of Rollerena as a public self. — Emilie Hardman, JSTOR Daily, 24 June 2026

Word History

Etymology

acquired immunodeficiency syndrome

First Known Use

1982, in the meaning defined above

Phrases Containing AIDS

• AIDS-related complex
• AIDS virus
• anti-AIDS

Rhymes for AIDS

• aides
• blades
• braids
• cades
• fades
• glades
• grades
• jades
• maids
• nsaids
• plaids
• raids

Kids Definition

AIDS

noun

ˈādz 

: 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

ˈādz 

: 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