n. 1.a prediction made by extrapolating from past observations 2.the projection of an image from a film onto a screen 3.a planned undertaking 4.any structure that branches out from a central support 5.any solid convex shape that juts out from something 6.(psychiatry) a defense mechanism by which your own traits and emotions are attributed to someone else 7.the acoustic phenomenon that gives sound a penetrating quality 8.the representation of a figure or solid on a plane as it would look from a particular direction 9.the act of projecting out from something 10.the act of expelling or projecting or ejecting