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overhead projector

noun

Simple Definition of overhead projector

  • : a device that shows information or pictures on a wall or screen by shining a light through a sheet with the information or pictures on it

Source: Merriam-Webster's Learner's Dictionary

Full Definition of overhead projector

  1. :  a projector for projecting onto a vertical screen magnified images of graphic material on a horizontal transparency illuminated from below —called also overhead

1951

First Known Use of overhead projector

1951


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