Definitions

1. adjective

relating to or designed to prevent or counteract a viral infection

“The doctor prescribed an antiviral medication to combat the flu.”

2. noun

a substance or agent that prevents or counteracts a viral infection

“The researcher was studying the effects of antiviral treatments on the virus.”

3. noun

a virus that infects or is related to another virus, especially one that has a similar or complementary genetic makeup

“The scientist isolated an antiviral virus that could potentially cure the disease.”