Children's, Intermediate and Advanced Online English Dictionary & Thesaurus

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passive immunity immunity to a disease acquired by injection of antibodies, transfer of antibodies from a mother to a fetus, or other transferences.
passive resistance the use of noncooperation, fasting, or other nonviolent means to oppose one's own government or an occupying force.
passive restraint an automatic system, as of inflatable air bags, to protect the driver and passengers in a motor vehicle during an accident.