[{"Bold_text": "noun", "List Items": ["a person or thing acting or serving in place of another.Synonyms: equivalent , replacement , alternative", "(formerly) a person who, for payment, served in an army or navy in the place of a conscript.", "Grammar.a word that functions as a replacement for any member of a class of words or constructions, asdoin He doesn't know but I do."]}, {"Bold_text": "verb (used with object)", "List Items": ["to put (a person or thing) in the place of another.", "to take the place of; replace.", "Chemistry.to replace (one or more elements or groups in a compound) by other elements or groups."]}, {"Bold_text": "verb (used without object)", "List Items": ["to act as a substitute."]}, {"Bold_text": "adjective", "List Items": ["of or relating to a substitute or substitutes.", "composed of substitutes."]}]