the world > movement > motion in a certain direction > change of direction of movement > [noun] > point at which (3)
Any of the turning points on a winding or zigzag path, stream, etc.; a bend.
lit. A point at which something turns, or changes its direction of motion, etc.; spec. a maximum or minimum point on a graph, where it begins to…
The action or fact of turning round; a point in a team-game at which the teams change ends to play in the opposite directions.