trajectory
noun
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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
Avivah Wittenberg-Cox, Forbes.com, 16 June 2025
In tennis, line-calling systems, which include Hawk-Eye technology, track the trajectory of balls using cameras, computers and microphones.
—Gary Phillips, New York Daily News, 14 June 2025
Listen to this article At an eighth grade graduation last week at his alma mater, John A. Walsh Elementary School in Pilsen, outgoing schools chief Pedro Martinez recounted to parents and students how one teacher — Mr. Asher — turned the trajectory of his life around.
—Nell Salzman, Chicago Tribune, 14 June 2025
The city’s school-age population, meanwhile, is on a downward trajectory, federal COVID-19 aid ran out this year and the district faces a budget deficit of more than $500 million.
—Jennifer Smith Richards, ProPublica, 13 June 2025
See All Example Sentences for trajectory
Cite this Entry
“Trajectory.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/trajectory. Accessed 28 Jun. 2025.
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trajectory
noun
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