AIDS

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noun \ˈādz\

Definition of AIDS

  1. :  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 (as Pneumocystis carinii pneumonia) and to some (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 (as semen) during sexual intercourse

Origin and Etymology of aids

acquired immunodeficiency syndrome


First Known Use: 1982


AIDS Defined for English Language Learners

AIDS

play
noun \ˈādz\

Definition of AIDS for English Language Learners

  • : a serious disease of the immune system that is caused by infection with a virus


Medical Dictionary

AIDS

play
noun \ˈādz\

Medical Definition of AIDS

  1. :  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


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