[{"Bold_text": "noun", "List Items": ["a device or unit added to equipment or a construction:an add-on to a computer;a nice add-on to an old house.", "an extra charge:Add-ons for taxes and tour guide fees boosted the price of the vacation to $2,500.", "an additional item, as a rider or provision:This is just another legislative add-on.", "anything added on:Our sable faux fur vest is an easy add-on for dressy or casual occasions."]}, {"Bold_text": "adjective", "List Items": ["being installed or provided as an add-on:Add-on packs for this game are just a few dollars."]}]