Source : Webster's Revised Unabridged Dictionary (1913)

Nib \Nib\, v. t. [imp. & p. p. {Nebbed}; p. pr. & vb. n.
   {Nibbing}.]
   To furnish with a nib; to point; to mend the point of; as, to
   nib a pen.

Source : WordNet®

nib
     n 1: the writing point of a pen [syn: {pen nib}]
     2: horny projecting mouth of a bird [syn: {beak}, {bill}, {neb},
         {pecker}]
     [also: {nibbing}, {nibbed}]

nibbing
     See {nib}