Definition of TRAJECTORY


Trajectory is a noun that refers to the path followed by a moving object or entity through space or time, typically influenced by forces such as gravity, momentum, or external influences.

Physical Motion: As a noun, trajectory describes the curved or linear path traced by a moving object, such as a projectile, vehicle, or celestial body, as it travels through space or air. The trajectory of an object is determined by its initial velocity, angle of launch, and the forces acting upon it.

Projectile Motion: In physics, trajectory specifically denotes the curved path followed by a projectile, such as a bullet, missile, or thrown object, under the influence of gravity. The trajectory of a projectile can be calculated using principles of mechanics and mathematics, taking into account factors such as air resistance and the Earth’s gravitational field.

Predictive Analysis: In various fields, including physics, engineering, astronomy, and ballistics, the concept of trajectory is essential for predicting the future path of objects and understanding their behavior in motion. By analyzing trajectories, researchers can anticipate the movement of projectiles, spacecraft, vehicles, and other entities.

Figurative Usage: Beyond its literal meaning in physics, trajectory is also used metaphorically to describe the course or development of events, behaviors, or trends over time. In this sense, the term implies a directional path or trend, often used in discussions of careers, relationships, and social or economic phenomena.

Trajectory, as a noun, refers to the path followed by a moving object or entity, whether in the physical realm of space and motion or in the metaphorical domain of trends and developments. Understanding trajectories is crucial for predicting the behavior of objects and phenomena and analyzing their patterns of movement or growth.

Examples of TRAJECTORY in a sentence

  • The rocket’s trajectory was carefully plotted to ensure it reached its destination with precision.
  • She observed the bird’s graceful trajectory as it soared through the sky.
  • The company’s sales showed an upward trajectory, indicating growth and expansion.
  • His career took an unexpected trajectory after he decided to pursue his passion for photography.
  • The stone’s trajectory was altered as it bounced off the surface of the water.
  • The economist analyzed the country’s economic trajectory, predicting future trends and developments.
  • The football player kicked the ball with perfect aim, sending it on a straight trajectory towards the goal.
  • The study of the asteroid’s trajectory revealed its potential path through the solar system.


The term trajectory finds its linguistic origins in Latin and Greek, reflecting the historical exploration of motion, path, and direction. Its etymology unveils the fundamental principles of physics and the study of objects in motion.

  • Etymology and Origins: The term trajectory originates from the Latin word “trajectoria,” which derives from the verb “trajicere,” meaning “to throw across” or “to throw through.” This Latin root emphasizes the concept of the path traced by a moving object. In Greek, the term “traiectoria” has similar connotations, signifying the course or route followed by an object in motion.
  • Scientific Context: In the realm of physics, a trajectory refers to the path that an object follows through space as it moves under the influence of external forces. It is a fundamental concept in mechanics, astronomy, and ballistics, providing insight into the motion of projectiles, celestial bodies, and particles. Trajectories can be described mathematically using principles such as Newton’s laws of motion and Kepler’s laws of planetary motion.
  • Contemporary Significance: In contemporary contexts, trajectory is utilized in various fields, including engineering, aviation, sports, and space exploration. It is employed to predict the flight paths of aircraft, model the behavior of projectiles, analyze the performance of athletes, and plan missions to outer space. Advances in technology have enabled more precise measurements and calculations of trajectories, enhancing our understanding of motion and dynamics.

The term trajectory embodies the principles of motion and direction, tracing its etymological roots from Latin and Greek to its present-day significance as a cornerstone of physics and scientific inquiry into the behavior of moving objects.


  • Path
  • Course
  • Route
  • Track
  • Orbit
  • Flight
  • Curve
  • Arc


  • Standstill
  • Stagnation
  • Immobility
  • Fixity
  • Rest
  • Inactivity
  • Halt
  • Pause


  1. Projection
  2. Movement
  3. Direction
  4. Locus
  5. Waypoint
  6. Progression
  7. Trajectory analysis

🌐 🇬🇧 TRAJECTORY in other languages

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