viral

adjective

vi·​ral ˈvī-rəl 

1

: of, relating to, or caused by a virus

a viral infection

2

: quickly and widely spread or popularized especially by means of social media

a viral video

virally

ˈvī-rə-lē 

adverb

virality

vī-ˈra-lə-tē 

noun

Examples of viral in a Sentence

Recent Examples on the Web

Thankfully, a cure for the viral infection was found in 2011 and Anderson was officially free of the disease by 2015. — Chris Murphy, Vanity Fair, 7 Sep. 2026

More strikes mean more strikeouts, and more viral celebrations for Jumpin’ Jefry and the Mets. — Abbey Mastracco, New York Daily News, 6 Sep. 2026

Norwalk resident Oswald Ponce became a viral chronicler of a dangerous intersection where the 105 Freeway abruptly ends. — Andrew J. Campa, Los Angeles Times, 6 Sep. 2026

The joint statement said Namibia had surpassed UNAIDS targets by achieving a target of 96% of people living with HIV knowing their status, 98% of those diagnosed receiving treatment, and 98% of those treated having achieved viral suppression. — ABC News, 5 Sep. 2026

Word History

Etymology

vir(us) + -al entry 1

First Known Use

1937, in the meaning defined at sense 1

Phrases Containing viral

• viral load
• viral marketing

Rhymes for viral

• chiral
• spiral
• adenoviral
• antiretroviral
• antiviral
• retroviral

Kids Definition

viral

adjective

vi·​ral ˈvī-rəl 

1

: of, relating to, or caused by a virus

a viral infection

2

: quickly and widely spread or popularized especially by person-to-person electronic communication

a viral video

Medical Definition

viral

adjective

vi·​ral ˈvī-rəl 

: of, relating to, or caused by a virus

viral infections

virally

-rə-lē 

adverb