Path vs Trajectory

When to use each in English, with meaning, register, and examples.

Path

Top 1,000 (very common)B1noun

Trajectory

Beyond 10,000 (less common)
Most common: Path
 PathTrajectory
Pronunciation🇬🇧 /["/pɑːθ/","/pɑːðz/"]/🇺🇸 /["/pæθ/","/pæðz/"]/🇬🇧 //trəˈdʒɛktəri//🇺🇸 //trəˈdʒɛktəri//
MeaningA way or track for walking or traveling.The path that something takes when moving through space.
ExampleThe path through the forest is very narrow.The missile followed a precise trajectory to reach its target.
RegisterNeutralNeutral
How commonTop 1,000 (very common)Beyond 10,000 (less common)
CEFR levelB1-
Part of speechnoun
Collocationslong, narrow, steep, follow, take, go along, go, run, descend, along a/​the path, down a/​the path, up a/​the path, off the beaten path, well-trodden, well-worn, clear, choose, find, follow, on a/​the path, path of, path to, cross paths (with somebody), obstacles in somebody/​something’s path, correct, right, flight, steer, trace, block, across something’s path, in something’s path, into something’s path, everything in somebody’s/​something’s pathset a trajectory, trajectory of a rocket, impact trajectory, predict the trajectory, adjust the trajectory
Antonymsroad, obstaclestatic, immobility
Common mistakesConfusing 'path' with 'way' — they have different usages., Using 'path' to describe a journey that is not literal., Incorrectly spelling 'path' as 'paf'Confused with 'pathway' or 'route' without understanding the specific context., Using 'trajectory' when referring to motion on a flat surface instead of in the air or space., Incorrectly inferring that 'trajectory' can only refer to physical paths, ignoring metaphorical uses.
Usage notesUse 'path' to describe physical trails or routes. Avoid using in highly technical contexts where 'route' might be more appropriate.Commonly used in scientific and mathematical contexts. Avoid in casual conversations unless discussing related topics like rockets or sports.

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Path
Trajectory

Frequently asked questions: Path vs Trajectory

What's the difference between Path and Trajectory?

Path: A way or track for walking or traveling. Trajectory: The path that something takes when moving through space.

Which is more common: Path and Trajectory?

Path is the most common in everyday English.

Can you show an example of each?

Path: The path through the forest is very narrow. Trajectory: The missile followed a precise trajectory to reach its target.

Can I use Path and Trajectory interchangeably?

Not always. Path and Trajectory are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.

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