If someone is HIV positive, they are infected with the HIV virus, and may develop AIDS. If someone is HIV negative, they are not infected with the virus.
See full dictionary entry for HIV
HIV-positive in British English
(ˌeɪtʃaɪviːˈpɒzɪtɪv)
adjective
medicine
infected with the HIV virus
In other languages
HIV positive HIV negative
British English: HIV-positive /eɪtʃ aɪ viː ˈpɒzɪtɪv/ ADJECTIVE
If someone is HIV-positive, they are infected with the HIV virus, which reduces the ability of people's bodies to fight illness, and they may develop AIDS.
Some people who are HIV-positive develop AIDS more slowly than others.