overhead projector
nounUK /ˌəʊvəhed prəˈdʒektə/
US /ˌoʊvərhed prəˈdʒektər/
A machine that shines a light through a clear sheet to show a big picture on a wall.
The teacher put her drawing on the overhead projector so everyone could see it.
RELATED WORDS
OTHER MEANINGS
2. A device used in meetings to display notes or diagrams on a screen.
He used the overhead projector to show the sales chart.
3. An old-style classroom tool for showing transparent sheets to students.
The overhead projector was replaced by a smartboard.
4. Any projector that sends an image upward onto a screen above it.
The overhead projector cast the map onto the whiteboard.