If something is grooved, it has a groove — a long, narrow cut — or several of them. A grooved tyre has channels so water can run off. A grooved board has a line cut so another piece can fit. An old music record is grooved: the needle sits in that spiral track. It is just groove with -ed on the end: either “it has grooves” or “someone cut grooves into it.” Ordinary, physical, used by builders, drivers, and anyone holding an old record. Though actually, people also stretch it when nothing has been cut at all. In sport, a grooved swing means the movement has settled into a repeating path, as if the body found a track and stayed in it. That stretch is more informal. The home meaning is still the cut you can see or feel.