Definition of "groundline" in English

noun

1. (art) A line drawn to signify the surface of the ground, especially in architectural blueprints and in drawings by children which lack dimension.

2. In equestrian show jumping, a marker such as a row of flowers which signifies the point from which a horse should begin a jump over an obstacle.

3. (fishing) A weighted fishing line that lies along the floor of the body of water in which the user is fishing.