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 window is slightly bigger for COVID: Your provider can prescribe an antiviral medication such as Paxlovid or Lagevrio within five days of your first symptom.9 Unfortunately, there’s no antiviral treatment for RSV, said Giamalva. Stephanie Anderson Witmer, Health, 28 Feb. 2025 The owner wasn’t tested for influenza, declined antiviral treatment and ended communication with the investigators. Susanne Rust, Los Angeles Times, 21 Feb. 2025
Noun
Chin-Hong also wants to remind people of the antivirals available to combat the worst outcomes. Harriet Blair Rowan, The Mercury News, 23 Feb. 2025 High hospitalization and death rates suggest that at-risk people are not being diagnosed early enough for antivirals like oseltamivir to be effective in preventing severe illness. Tom Rogers, Newsweek, 21 Feb. 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

Browse Nearby Words

Cite this Entry

“Antiviral.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/antiviral. Accessed 9 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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