Trajectories are PATHS or arcs that an object follows through space over time. They can be described as a series of points, connected by lines or curves, and can be used to describe the motion of a body in two or three dimensions. The term trajectories can be broken down into two parts: 'TRAJECT' meaning path or course, and 'ory' meaning relating to. The crossword solutions for the term trajectories are PATHS (5 letters) and ARCS (4 letters).