somersault UK /ˈsʌməˌsɒlt/US /ˈsʌmɚˌsɔlt/noun 1verb 1forms 3 noun1 •Starting on one's feet, an instance of rotating one's body 360 degrees while airborne or on the ground, with one's feet passing over one's head. verb1 •To perform a somersault.The performer somersaulted all the way across the stage. formssomersaulted · somersaulting · somersaults