I. vi ‧ ral 1 /ˈvaɪərəl $ ˈvaɪrəl/ BrE AmE adjective
1 . relating to or caused by a ↑ virus :
a viral infection
2 . passed on to other people on the Internet or using ↑ mobile phone s :
It is one of the most viewed viral videos on the web.
II. viral 2 BrE AmE noun [countable]
a viral video, advertisement etc:
They use humorous virals to promote their products.