Furl/fɜːrl/ Definition 1 of 1Pro Tip 1/3Maritime Origin Originally used in nautical contexts to secure sails on ships. After docking, we furled the sails meticulously. Pro Tip 2/3Beyond Sailing 'Furl' applies to rolling up other things, like flags or umbrellas, not just sails. It started to drizzle, so I furled my umbrella and went inside. Pro Tip 3/3Action of Care Furling is done carefully to preserve what's being furled, suggesting attention to detail. The flag was old and fragile, so we furled it gently.