\Tra*ject"\, v. t. [imp. & p. p. {Trajected}; p. pr. & vb. n. {Trajecting}.] [L. trajectus, p. p. of trajicere to throw across; trans across + jacere to throw. See {Jet} a shooting forth.] To throw or cast through, over, or across; as, to traject the sun's light through three or more cross prisms. [R.] --Sir I. Newton.
\Traj"ect\, n. [L. trajectus, fr. trajicere: cf. F. trajet, OF. traject. See {Traject}, v. t.] 1. A place for passing across; a passage; a ferry. [Obs.] --Cotgrave. 2. The act of trajecting; trajection. 3. A trajectory. [R.] --I. Taylor.