资料来源 : Webster's Revised Unabridged Dictionary (1913)

Luff \Luff\, v. i. [imp. & p. p. {Luffed}; p. pr. & vb. n.
   {Luffing}.] (Naut.)
   To turn the head of a vessel toward the wind; to sail nearer
   the wind; to turn the tiller so as to make the vessel sail
   nearer the wind.

   {To luff round}, or {To luff alee}, to make the extreme of
      this movement, for the purpose of throwing the ship's head
      into the wind.