Viral – English Flashcard for Viral with Synonyms Updated: June 24, 2019 by Dr. Mohammad Hossein Hariri AslViralViral (adj) /ˈvaɪə.rəl/ US /ˈvaɪ-/of a virus – virus-related – caused by virus – messages and media that are forwarded and become widespread on the internet:Flu and AIDS are viral diseases.