projector
n. countablen. a machine that shines light onto a wall or screen to show images, movies, or presentations. You use it in classrooms or offices so everyone can see the same thing at once.
n. an optical device that shines images or video onto a surface, typically a large screen or wall. Often used in educational or professional settings for presentations.
The teacher turned on the projector to show the slides.
We had to dim the lights in the conference room so the projector image would be clear.
Modern digital projectors offer high-resolution output and wireless connectivity, allowing presenters to share content directly from their mobile devices without needing complex cable setups.
Partly from Latin projector (“person who throws away”); partly directly from project + -or.
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.
Last updated May 6, 2026