[{"Bold_text": "adverb", "List Items": ["(of two similar events) following one immediately after the other; in unbroken sequence; consecutively :After losing all day, he picked winners back to back in the last two races."]}, {"Bold_text": "adjective", "List Items": ["adjacent or contiguous but oppositely oriented; having the backs close together or adjoining:The seats in the day coach are back to back.", "Stud Poker.(of a pair) consisting of the hole card and the first upcard:He had aces back to back."]}]