Source : Webster's Revised Unabridged Dictionary (1913)

Furl \Furl\, v. t. [imp. & p. p. {Furld}; p. pr. & vb. n.
   {Furling}.] [Contr. fr. furdle, fr. fardel bundle: cf. F.
   ferler to furl, OF. fardeler to pack. See {Furdle}, {Fardel},
   and cf. {Farl}.]
   To draw up or gather into close compass; to wrap or roll, as
   a sail, close to the yard, stay, or mast, or, as a flag,
   close to or around its staff, securing it there by a gasket
   or line. Totten.