1 the act or an instance of projecting; the process of being projected.
2 a thing that projects or obtrudes.
3 the presentation of an image etc. on a surface or screen.
4 a a forecast or estimate based on present trends (a projection of next year's profits). b this process.
5 a a mental image or preoccupation viewed as an objective reality. b the unconscious transfer of one's own impressions or feelings to external objects or persons.
6 Geom. the act or an instance of projecting a figure.
7 the representation on a plane surface of any part of the surface of the earth or a celestial sphere (Mercator projection).
Derivatives:
projectionist n. (in sense 3).
Etymology: L projectio (as PROJECT)
Useful english dictionary. 2012.