Definition of biodefence noun from the Oxford Advanced Learner's Dictionary

 

biodefence

 noun
(North American English biodefense)noun
BrE BrE//ˌbaɪəʊdɪˈfens//
 
; NAmE NAmE//ˌbaɪoʊdɪˈfens//
 
[uncountable]
 
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measures taken to protect people against an attack using biological weapons (= weapons of war that spread disease)