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

As investors brace for an eventful week, attention remains focused on how the U.S. election, Fed decisions, and potential Chinese stimulus measures could shape the trajectory of global markets. —Thomas G. Moukawsher, Newsweek, 5 Nov. 2024

Starting with Puss In Book: Trapped In An Epic Tale, viewers could make a series of decisions that would alter the trajectory of the narrative. —Chris Morris, Fortune, 5 Nov. 2024

Kamp has promised to continue the trajectory of former Sheriff Paul Penzone, the Democrat who unseated Arpaio in 2016. —Jimmy Jenkins, The Arizona Republic, 5 Nov. 2024

The move, in many ways, altered the trajectory of the program. —Ryan Kartje, Los Angeles Times, 4 Nov. 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