To come or go after; proceed behind, To be parallel to, To engage in (a trade or occupation); work at, noun_ In billiards, a stroke which causes the cue-ball to follow the object-ball after impact, The difference in the external diameter of a spring, especially of a coiled or helical spring, when unloaded and when compressed by its working load The torsion of the rod which forms the coil tends to increase the diameter as the spring closes