The Collaborative International Dictionary of English v.0.48:

Barb \Barb\, v. t. [imp. & p. p. Barbed (b[aum]rbd); p. pr. &
   vb. n. Barbing.]
   1. To shave or dress the beard of. [Obs.]
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   2. To clip; to mow. [Obs.] --Marston.
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   3. To furnish with barbs, or with that which will hold or
      hurt like barbs, as an arrow, fishhook, spear, etc.
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            But rattling storm of arrows barbed with fire.
                                                  --Milton.
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