1. Literally, to give off emissions or reflections of flashing, twinkling, or glittering light from some source. The water in the bay sparkled with the reflections of the city lights. I love seeing all the houses sparkling with Christmas lights each winter.

2. To be especially vivacious, energetic, or exciting because of some aspect or element. The debate sparkled with passionate, well-spoken arguments from both sides. The movie sparkles with incredible performances by its entire cast. Her eyes were sparkling with a fierce determination to win.