The word AIDS stands for Acquired Immuno Deficiency Syndrome. AIDS is a medical diagnosis for a combination of symptoms, which results from a breakdown of the immune system. 'A' stands for acquired which means that it is obtained or received by a person and is something, which is not genetically inherited. 'ID' stands for Immuno Deficiency which means there is deficiency in the immune system or that the immune system is weakened. 'S' stands for syndrome that stands to emphasize that AIDS is not just one disease or symptom but presents as a group of diseases or symptoms.