The Collaborative International Dictionary of English v.0.48:

Hatchet \Hatch"et\ (-[e^]t), n. [F. hachette, dim. of hache ax.
   See 1st Hatch, Hash.]
   1. A small ax with a short handle, to be used with one hand.
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   2. Specifically, a tomahawk.
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            Buried was the bloody hatchet.        --Longfellow.
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   hatchet face, a thin, sharp face, like the edge of a
      hatchet; hence:

   hatchet-faced, sharp-visaged. --Dryden.

   To bury the hatchet, to make peace or become reconciled.

   To take up the hatchet, to make or declare war. The last
      two phrases are derived from the practice of the American
      Indians.

The Collaborative International Dictionary of English v.0.48:

Bury \Bur"y\, v. t. [imp. & p. p. Buried; p. pr. & vb. n.
   Burying.] [OE. burien, birien, berien, AS. byrgan; akin to
   beorgan to protect, OHG. bergan, G. bergen, Icel. bjarga, Sw.
   berga, Dan. bierge, Goth. ba['i]rgan. [root]95. Cf.
   Burrow.]
   1. To cover out of sight, either by heaping something over,
      or by placing within something, as earth, etc.; to conceal
      by covering; to hide; as, to bury coals in ashes; to bury
      the face in the hands.
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            And all their confidence
            Under the weight of mountains buried deep. --Milton.
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   2. Specifically: To cover out of sight, as the body of a
      deceased person, in a grave, a tomb, or the ocean; to
      deposit (a corpse) in its resting place, with funeral
      ceremonies; to inter; to inhume.
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            Lord, suffer me first to go and bury my father.
                                                  --Matt. viii.
                                                  21.
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            I'll bury thee in a triumphant grave. --Shak.
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   3. To hide in oblivion; to put away finally; to abandon; as,
      to bury strife.
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            Give me a bowl of wine
            In this I bury all unkindness, Cassius. --Shak.
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   Burying beetle (Zool.), the general name of many species of
      beetles, of the tribe Necrophaga; the sexton beetle; --
      so called from their habit of burying small dead animals
      by digging away the earth beneath them. The larv[ae] feed
      upon decaying flesh, and are useful scavengers.

   To bury the hatchet, to lay aside the instruments of war,
      and make peace; -- a phrase used in allusion to the custom
      observed by the North American Indians, of burying a
      tomahawk when they conclude a peace.
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   Syn: To intomb; inter; inhume; inurn; hide; cover; conceal;
        overwhelm; repress.
        [1913 Webster] Burying ground