[{"Bold_text": "adjective", "List Items": ["no longer in general use; fallen into disuse:an obsolete expression.Antonyms: modern , new", "of a discarded or outmoded type; out of date:an obsolete battleship.Synonyms: old , ancient , antiquated Antonyms: modern , new", "(of a linguistic form) no longer in use, especially, out of use for at least the past century.Compare archaic .", "effaced by wearing down or away.", "Biology.imperfectly developed or rudimentary in comparison with the corresponding character in other individuals, as of a different sex or of a related species."]}, {"Bold_text": "verb (used with object)", "List Items": ["to make obsolete by replacing with something newer or better; antiquate:Automation has obsoleted many factory workers."]}]