bioterrorismPronunciation: /ˌbʌɪəʊˈtɛrərɪz(ə)m/Translate bioterrorism | into German | into Italian Definition of bioterrorism noun [mass noun] the use of infectious agents or other harmful biological or biochemical substances as weapons of terrorism. Derivatives bioterrorist noun bioterrorism in other Oxford dictionaries Definition of bioterrorism in the US English dictionary