[{"Bold_text": "adverb", "List Items": ["at one time in the past; formerly :I was a farmer once;a once powerful nation.", "a single time:We go to a movie once a week.We ate there just once.We go to a movie once a week.", "even a single time; at any time; ever :If the facts once become known, it will be just too bad.", "by a single step, degree, or grade:a cousin once removed."]}, {"Bold_text": "adjective", "List Items": ["former; having at one time been:the once and future king."]}, {"Bold_text": "conjunction", "List Items": ["if or when at any time; if ever.", "whenever; as soon as:Once you're finished, you can leave."]}, {"Bold_text": "noun", "List Items": ["a single occasion; one time only:Once is enough."]}]