[{"Bold_text": "verb (used without object)", "List Items": ["to go away; get out (usually used as a command):I said I was busy, so scram."]}, {"Bold_text": "noun", "List Items": ["the rapid shutdown of a nuclear reactor in an emergency."]}, {"Bold_text": "verb (used with object)", "List Items": ["to shut down (a nuclear reactor) rapidly in an emergency."]}]