Definition of overhead projector
: a projector for projecting onto a vertical screen magnified images of graphic material on a horizontal transparency illuminated from below —called also overhead
First Known Use of overhead projector
OVERHEAD PROJECTOR Defined for English Language Learners
Definition of overhead projector for English Language Learners
: 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
Seen and Heard
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