antiviral

1 of 2

adjective

an·​ti·​vi·​ral ˌan-tē-ˈvī-rəl How to pronounce antiviral (audio)
ˌan-tī-
1
medical : acting, effective, or directed against viruses
an antiviral vaccine/drug
2
: used to protect a computer from viruses : antivirus
antiviral software

antiviral

2 of 2

noun

: an antiviral agent and especially a drug
antivirals used in treating influenza

Examples of antiviral in a Sentence

Recent Examples on the Web
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Adjective
Concerned, the Brooklyn-native returned to his primary care provider but was immediately sent to the emergency room to receive antiviral treatment through an IV. Tereza Shkurtaj, PEOPLE, 21 Sep. 2025 There is no cure for hepatitis B, but certain medications, like antiviral drugs, can make the virus inactive. Angelica Stabile, FOXNews.com, 18 Sep. 2025
Noun
He was prescribed an antiviral, and within a few weeks, the rash cleared up. Tereza Shkurtaj, PEOPLE, 21 Sep. 2025 These antiviral, antibacterial and anti-inflammatory herbs support immune function. Chrystle Fiedler, USA Today, 19 Sep. 2025 See All Example Sentences for antiviral

Word History

First Known Use

Adjective

1929, in the meaning defined at sense 1

Noun

1959, in the meaning defined above

Time Traveler
The first known use of antiviral was in 1929

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Cite this Entry

“Antiviral.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/antiviral. Accessed 30 Sep. 2025.

Medical Definition

antiviral

1 of 2 adjective
an·​ti·​vi·​ral -ˈvi-rəl How to pronounce antiviral (audio)
variants also antivirus
: acting, effective, or directed against viruses
antiviral drugs

antiviral

2 of 2 noun
: an antiviral agent and especially a drug
Last Updated: - Updated example sentences
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