The ordered set of intermediate states assumed by a dynamical system as a result of time evolution.
A course of development, such as that of a war or career.
From New Latin la, from trāiectōrius, from Latin trāiectus, past participle of trāiciō, from trans- (see trans-) + iaciō (from Proto-Indo-European *(H)yeh₁-). Middle French and Middle English had trajectorie (“end of a funnel”), from Latin trāiectōrium.
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