1. The act of projecting or the condition of being projected.

2. A thing or part that extends outward beyond a prevailing line or surface: spiky projections on top of a fence; a projection of land along the coast.

3. A plan for an anticipated course of action: “facilities [that] are vital to the projection of U.S. force ... in the Pacific” (Alan D. Romberg).

4. A prediction or estimate of something in the future, based on present data or trends.

6. Mathematics The image of a geometric figure reproduced on a line, plane, or surface.

7. A system of intersecting lines, such as the grid of a map, on which part or all of the globe or another spherical surface is represented as a plane surface.

8. Psychology The attribution of one's own attitudes, feelings, or suppositions to others, thought in psychoanalytic theory to be an unconscious defense against anxiety or guilt.