What is the best definition for the word trajectory?

The term "trajectory" best fits the definition of "direction" as it refers to the path that an object follows as it moves through space. In a broader sense, trajectory can indicate the progression or course of an event or situation over time, indicating not just the physical direction but also the intended path of development or movement in various contexts, such as a project or a personal goal. This concept is often used in physics, astronomy, and even in discussions of personal or professional growth, making "direction" a foundational element of its meaning.