trajectory

noun

tra·​jec·​to·​ry trə-ˈjek-t(ə-)rē 

plural trajectories

1

: the curve that a body (such as a planet or comet in its orbit or a rocket) describes in space

2

: a path, progression, or line of development resembling a physical trajectory

an upward career trajectory

Did you know?

Formed with part of the prefix trans-, "across", trajectory means a "hurling across". By calculating the effect of gravity and other forces, the trajectory of an object launched into space at a known speed can be computed precisely. Missiles stand a chance of hitting their target only if their trajectory has been plotted accurately. The word is used most often in physics and engineering, but not always; we can also say, for example, that the trajectory of a whole life may be set in a person's youth, or that a new book traces the long trajectory of the French empire.

Examples of trajectory in a Sentence

the trajectory of the missile

Recent Examples on the Web

The brands and leaders who embrace this responsibility today will not only shape the trajectory of their industries but also define ethical and innovative standards for future generations. —Jason Snyder, Forbes, 12 Dec. 2024

The next day, Michael heard from another camp that was located in the north woods of Wisconsin, offering him a position that would change the trajectory of his life. —Chris Gallagher, USA TODAY, 12 Dec. 2024

The trajectory of inflation could shift in the coming months. —Max Zahn, ABC News, 11 Dec. 2024

This can set them on a lifelong trajectory for worse educational outcomes, isolation, and poor mental health. —Gillian Telling, People.com, 10 Dec. 2024

Word History

Etymology

New Latin trajectoria, from feminine of trajectorius of passing, from Latin traicere to cause to cross, cross, from trans-, tra- trans- + jacere to throw — more at jet

First Known Use

1696, in the meaning defined at sense 1

Kids Definition

trajectory

noun

tra·​jec·​to·​ry trə-ˈjek-t(ə-)rē 

plural trajectories

: the curve that a body (as a planet in its orbit or a rocket) travels along in space