Definition of antiviral adjective from the Oxford Advanced American Dictionary

 

antiviral

 adjective
adjective
NAmE//ˌæntiˈvaɪrəl//
 
, NAmE//ˌæntaɪ‑//
 
 
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(of a drug) used to treat infectious diseases caused by a virus
See the Oxford Advanced Learner's Dictionary entry: antiviral