[{"Bold_text": "adjective", "List Items": ["of, relating to, or caused by a virus .", "pertaining to or involving the spreading of information and opinions about a product or service from person to person, especially on the internet or in emails: viral marketing viral marketing.a clever viral ad.", "becoming very popular by circulating quickly from person to person, especially through the internet:the most memorable viral videos;This book is already viral two weeks before its official publication date.", "pertaining to a computer virus computer virus."]}]