overhead projector

Definitions

An optical device that projects an enlarged image of a transparent slide or sheet onto a screen or wall.

A piece of audiovisual equipment consisting of a light source, a lens, and a mirror that displays images from transparencies placed on a horizontal stage.

Examples

The teacher placed the transparency sheet onto the overhead projector to display the lesson notes to the class.

Before the invention of digital smartboards, the overhead projector was a staple piece of equipment in every school classroom.

Synonyms

transparency projector overhead visual presenter projection device

Antonyms

digital projector computer monitor television screen interactive whiteboard