A "weyr" is a term used in the fictional universe of Anne McCaffrey's Dragonriders of Pern. It refers to a large, cavernous structure where dragons and their riders live and train. Weyrs are typically located on high cliffs or mountains, providing a strategic vantage point for the dragons to take flight. In a weyr, the dragonriders form a close-knit community, sharing responsibilities for caring for the dragons and protecting their home from threats. Each weyr is led by a Weyrleader, who is usually the strongest dragonrider, and they work together with other riders to ensure the safety and well-being of their dragons and the surrounding area.