- an apparatus for throwing an image on a screen, as a motion-picture projector or magic lantern.
- a device for projecting a beam of light.
- a person who forms projects or plans.
- a person who devises underhanded or unsound plans; schemer.
- an optical instrument that projects an enlarged image of individual slides onto a screen or wall
- an optical instrument in which a strip of film is wound past a lens at a fixed speed so that the frames can be viewed as a continuously moving sequence on a screen or wall
- a device for projecting a light beam
- a person who devises projects