1. trans. To reverse or undo the action of snapping; to release or detach by undoing a snap or catch.
1862. Dickens, Somebodys Luggage, ii. As if nothing should ever tempt her to unsnap that snap [of the fingers].
1901. Munseys Mag., XXV. 736/2. The colt was led in, the tie strap was unsnapped from his halter, and he was allowed [etc.].
1904. A. L. Artus, Mere English, 62. At dusk of the day we unsnapped our teeth, And spewed him out.
2. intr. To give way with a snap.
1866. Meredith, Vittoria, vii. After he had drawn the seal over the lamp, the green wax bubbled and unsnapped.