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
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Adjective
The idea of using an antiviral treatment to protect people at high risk of infection isn’t new. Alice Park, TIME, 14 Mar. 2025 The Food and Drug Administration approved this antiviral compound for the treatment of COVID-19 on Oct. 22, 2020. Dave Wessner, Forbes, 11 Mar. 2025
Noun
In addition to Tamiflu, there are three other antivirals approved to treat the flu in the U.S.: Relenza (zanamivir), Rapivab (peramivir), and Xofluza (baloxavir marboxil). Kaitlin Sullivan, Health, 22 Feb. 2025 However, because of the supply of antivirals and the flu vaccine, the Spanish Flu is unlikely to be the cause of another pandemic. Amanda Castro, Newsweek, 27 Dec. 2024 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 24 Mar. 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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