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Definition of suppression
the action of suppressing something such as an activity or publication:the forcible suppression of campus protests Medicine stoppage or reduction of a discharge or secretion. Biology the absence or nondevelopment of a part or organ that is normally present. Genetics the canceling of the effect of one mutation by a second mutation. Psychology the restraint or repression of an idea, activity, or reaction by something more powerful. Psychoanalysis the conscious inhibition of unacceptable memories, impulses, or desires. prevention of electrical interference.