Projector (noun)

1. A device that projects an image or video onto a surface or screen.
2. A machine or device used to project images, slides or films onto a screen or other surface.

Origin:

From latin projector ("one who plans or schemes"), from pro- ("forward") + jaciō ("i thro.w")

Examples:

1. The projector was used to show the movie in the auditorium.
2. He used the projector to give a presentation on his laptop.
3. The school purchased new projectors for the classrooms.
4. The projector was not working properly causing the image to be distorted.
5. The projector was used to display the diagrams on the whiteboard.