Added 9 October 2026 viral /ˈvaɪɹəl/ adjective Categories: Describing WordsUncommon Words adjective ! Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about viral at Wordnik → Where our words come from → Relating to or caused by a virus. viral infection Related Words: virologicalvirologicvirusvirologyhivinfectiousinfectedanti-viralantiviralintestinalmanufacturerviruses Back to today's word