Definition from Wiktionary, the free dictionary
somersault (plural somersaults)
- (chiefly gymnastics) Starting on one's feet, an instance of rotating one's body 360 degree while airborne, with one's feet going over one's head.
the act of going head over heels
- To perform a somersault.
- The performer somersaulted all the way across the stage.
to perform somersault