Main Entry: tra·jec·to·ry

Pronunciation: \trə-ˈjek-t(ə-)rē\

Function: noun

Inflected Form(s): plural tra·jec·to·ries

Etymology: New Latin trajectoria, from feminine of trajectorius of passing, from Latin traicere to cause to cross, cross, from trans-, tra- trans- + jacere to throw — more at jet

Date: 1696

1 : the curve that a body (as a planet or comet in its orbit or a rocket) describes in space
2 : a path, progression, or line of development resembling a physical trajectory <an upward career trajectory>