a.

1. 免疫的
2. 免除的；免於……的

n.

1. 免疫者
2. 免除者

adj.

1. resistant to a particular infection owing to the presence of specific antibodies or sensitized white blood cells.
   ▸Biology  relating to such resistance:

   the immune system.
2. exempt from an obligation or penalty.
3. (often immune to) not affected by something.