intransitive verb
Definition: To roll up or fold something, especially fabric or a flag, so that it is compact and secured.
Example: The sail will furl when the wind dies down.
noun
Definition: A single roll or a rolled section of something, often used to describe a coil or the act of rolling something up.
Example: The sailor made a neat furl of the sail before storing it away.
transitive verb
Definition: To roll up and fasten something, like a flag or sail, so that it is secured and not hanging loose.
Example: After the storm, we had to furl the sails to prevent damage to the boat.