A venetian blind is a window covering made of horizontal slats that you can tilt, raise, or lower to control light and privacy. The slats (thin, flat strips) are usually made of wood, plastic, or metal, and they're connected by cords or strings. By pulling a cord or twisting a wand, you can angle the slats to let in as much or as little light as you want, or raise the whole blind to uncover the window completely.

Today, venetian blinds are common in homes, schools, and offices around the world.

What makes venetian blinds clever is their flexibility. If the sun is too bright during an afternoon class, tilting the slats blocks the glare while still letting some light through. If you want complete privacy at night, you can close them fully. If you want to see outside, you can raise them entirely. This adjustability is why venetian blinds have remained popular for so long: they give you precise control over your space in a simple, mechanical way.