Longman Dictionary of Contemporary English homepage

Date: 1600-1700
Language: Modern Latin
Origin: trajectoria, from Latin trajectus, past participle of traicere 'to cause to cross', from trans- ( TRANS-) + jacere 'to throw'

trajectory

 noun
     
Related topics: Physics
tra‧jec‧to‧ry plural trajectories [countable]
1 technicalHP the curved path of an object that has been fired or thrown through the air
2 formal the events that happen during a period of time, which often lead to a particular aim or result:
The decision was certain to affect the trajectory of French politics for some time to come.
Definition from the Longman Dictionary of Contemporary English
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