The Collaborative International Dictionary of English v.0.48:

Tear \Tear\ (t[^a]r), v. t. [imp. Tore (t[=o]r), ((Obs.
   Tare) (t[^a]r); p. p. Torn (t[=o]rn); p. pr. & vb. n.
   Tearing.] [OE. teren, AS. teran; akin to OS. farterian to
   destroy, D. teren to consume, G. zerren to pull, to tear,
   zehren to consume, Icel. t>ae/ra, Goth. gata['i]ran to
   destroy, Lith. dirti to flay, Russ. drate to pull, to tear,
   Gr. de`rein to flay, Skr. dar to burst. [root]63. Cf. Darn,
   Epidermis, Tarre, Tirade.]
   1. To separate by violence; to pull apart by force; to rend;
      to lacerate; as, to tear cloth; to tear a garment; to tear
      the skin or flesh.
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            Tear him to pieces; he's a conspirator. --Shak.
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   2. Hence, to divide by violent measures; to disrupt; to rend;
      as, a party or government torn by factions.
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   3. To rend away; to force away; to remove by force; to
      sunder; as, a child torn from its home.
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            The hand of fate
            Hath torn thee from me.               --Addison.
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   4. To pull with violence; as, to tear the hair.
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   5. To move violently; to agitate. "Once I loved torn ocean's
      roar." --Byron.
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   To tear a cat, to rant violently; to rave; -- especially
      applied to theatrical ranting. [Obs.] --Shak.

   To tear down, to demolish violently; to pull or pluck down.


   To tear off, to pull off by violence; to strip.

   To tear out, to pull or draw out by violence; as, to tear
      out the eyes.

   To tear up, to rip up; to remove from a fixed state by
      violence; as, to tear up a floor; to tear up the
      foundation of government or order.
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The Collaborative International Dictionary of English v.0.48:

Tare \Tare\, v. t. [imp. & p. p. Tared; p. pr. & vb. n.
   Taring.]
   To ascertain or mark the tare of (goods).
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The Collaborative International Dictionary of English v.0.48:

Tare \Tare\, obs. imp. of Tear.
   Tore.
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The Collaborative International Dictionary of English v.0.48:

Tare \Tare\, n. [Cf. Prov. E. tare brisk, eager, OE. tarefitch
   the wild vetch.]
   1. A weed that grows among wheat and other grain; -- alleged
      by modern naturalists to be the Lolium temulentum, or
      darnel.
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            Didst not thou sow good seed in thy field? From
            whence then hath it tares?            --Matt. xiii.
                                                  27.
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            The "darnel" is said to be the tares of Scripture,
            and is the only deleterious species belonging to the
            whole order.                          --Baird.
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   2. (Bot.) A name of several climbing or diffuse leguminous
      herbs of the genus Vicia; especially, the Vicia
      sativa, sometimes grown for fodder.
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The Collaborative International Dictionary of English v.0.48:

Tare \Tare\, n. [F. tare; cf. Pr., Sp., Pg., & It. tara; all fr.
   Ar. tarah thrown away, removed, fr. taraha to reject,
   remove.] (Com.)
   Deficientcy in the weight or quantity of goods by reason of
   the weight of the cask, bag, or whatever contains the
   commodity, and is weighed with it; hence, the allowance or
   abatement of a certain weight or quantity which the seller
   makes to the buyer on account of the weight of such cask,
   bag, etc.
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WordNet (r) 3.0 (2006):

tare
    n 1: an adjustment made for the weight of the packaging in order
         to determine the net weight of the goods
    2: any of several weedy vetches grown for forage
    3: weedy annual grass often occurs in grainfields and other
       cultivated land; seeds sometimes considered poisonous [syn:
       darnel, tare, bearded darnel, cheat, Lolium
       temulentum]
    4: the weight of a motor vehicle, railroad car, or aircraft
       without its fuel or cargo
    5: (chemical analysis) a counterweight used in chemical
       analysis; consists of an empty container that counterbalances
       the weight of the container holding chemicals