Overhead-projector meaning

The definition of an overhead projector is a machine that causes an image from a transparent sheet to be projected onto a viewing screen.

An example of an overhead projector is what a teacher uses to show their class an enlarged version of a class assignment.

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A projector that projects onto a screen or surface the image on a transparency placed over the projector's light source, with the image redirected by an overhead mirror.
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A projector having a flat, transparent top on which a sheetlike transparency is placed, and an overhead mirror that reflects the image on the transparency to a screen.
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A projector that projects an image over the heads of the viewers onto a screen in front of them.
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