immune Definition

free, exempt

marked by protection

not susceptible or responsive; especially : having a high degree of resistance to a disease

a bodily response to an antigen that occurs when lymphocytes identify the antigenic molecule as foreign and induce the formation of antibodies and lymphocytes capable of reacting with it and rendering it harmless —called also immune reaction

the bodily system that protects the body from foreign substances, cells, and tissues by producing the immune response and that includes especially the thymus, spleen, lymph nodes, special deposits of lymphoid tissue (as in the gastrointestinal tract and bone marrow), macrophages, lymphocytes including the B cells and T cells, and antibodies

aids

having, exhibiting, or providing an unusual degree of immunity; especially : containing exceptionally large quantities of an antibody

a rare congenital disorder of the immune system that is characterized by inability to produce a normal complement of antibodies and T cells and that usually results in early death —called also severe combined immune deficiency