Emily Dickinson Lexicon

CURV'ET, n. [It. corvetta; Fr. courbette; Sp. corveta. See Curve.]

1. In the manege, a particular leap of a horse, when he raises both his fore legs at once, equally advanced, and as his fore legs are falling, he raises his hind legs, so that all his leg are raised at once. – Encyc.
2. A prank; a frolick.