noun
( -s )
Etymology: Middle English, from gerund of springen to spring — more at spring
1. : the act, action, or process of one that springs
2. : the architectural member that constitutes the first upward curvature of an arch or vault ; also : the initial point of such curvature
3. : the springs with which an automotive vehicle is equipped
allow much softer springing to be used at the front than the rear — Country Life