1a rectangular key fitting into grooves in the hub and shaft of a wheel, especially one formed integrally with the shaft that allows movement of the wheel on the shaft. a corresponding groove in a hub along which the key may slide. a flexible wood or rubber strip used especially in drawing large curves. 3 (also spline curve) Mathematics a continuous curve constructed so as to pass through a given set of points and have a certain number of continuous derivatives.
verb [with object]
secure (a part) by means of a spline.
(usually as adjective splined
) fit with a spline:splined freewheels