n. 1.a verbalization that encourages you to attempt something 2.any pointed projection 3.tubular extension at the base of the corolla in some flowers 4.a sharp prod fixed to a rider's heel and used to urge a horse onward 5.a railway line connected to a trunk line spur v. 1.incite or stimulate 2.give heart or courage to 3.strike with a spur 4.goad with spurs 5.equip with spurs