noun.
Suppression of the immune response, as by drugs or radiation, in order to prevent the rejection of grafts or transplants or to control autoimmune diseases.
noun.
The activemedicalsuppression of the immune response.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
noun.
lowering the body's normal immune response to invasion by foreign substances; can be deliberate (as in lowering the immune response to prevent rejection of a transplanted organ) or incidental (as a side effect of radiotherapy or chemotherapy for cancer)