What does acquired immunity mean?
• ACQUIRED IMMUNITY (noun) The noun ACQUIRED IMMUNITY has 1 sense: 1. immunity to a particular disease that is not innate but has been acquired during life; immunity can be acquired by the development of antibodies after an attack of an infectious disease or by a pregnant mother passing antibodies through the placenta to a fetus or by vaccination Familiarity information: ACQUIRED IMMUNITY used as a noun is very rare.