/ trəˈdʒektəri; NAmE / ( pl. -ies ) noun
( technical ) the curved path of sth that has been fired, hit or thrown into the air :
a missile's trajectory
( figurative )
My career seemed to be on a downward trajectory.
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WORD ORIGIN
late 17th cent.: from modern Latin trajectoria (feminine), from Latin traject- thrown across, from the verb traicere , from trans- across + jacere to throw.