[{"Bold_text": "noun", "List Items": ["Jazz.a melodic phrase, often constantly repeated, forming an accompaniment or part of an accompaniment for a soloist.", "a new variation on or a different manifestation of an existing thing or idea (often followed byon):This is an eco-conscious riff on the study-abroad experience."]}, {"Bold_text": "verb (used without object)", "List Items": ["Jazz.to perform a repeated melodic phrase, forming an accompaniment for a soloist.", "to experiment with a thing or idea, making changes that create a new and novel version of it (often followed byon):My partner likes to let his ideas quietly simmer, but I prefer to riff on mine in conversations where I can bounce my thoughts off other people.", "to create, write, or perform something, like a comedy routine, using a common or known point of departure and following a previously unexplored tangent from that known point to a fresh or humorous perspective (often followed byonoroff):My act riffs off famous love stories and adds modern feminist elements to unmask the absurdity of “happily ever after” in fairy tales."]}, {"Bold_text": "noun", "List Items": ["a member of the Berber people living in Er Rif Er Rifin northern Morocco.", "Er Rif Er Rif."]}]