The Collaborative International Dictionary of English v.0.48:

Grave \Grave\, v. t. [imp. Graved (gr[=a]vd); p. p. Graven
   (gr[=a]v"'n) or Graved; p. pr. & vb. n. Graving.] [AS.
   grafan to dig, grave, engrave; akin to OFries. greva, D.
   graven, G. graben, OHG. & Goth. graban, Dan. grabe, Sw.
   gr[aum]fva, Icel. grafa, but prob. not to Gr. gra`fein to
   write, E. graphic. Cf. Grave, n., Grove, n.]
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   1. To dig. [Obs.] Chaucer.
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            He hath graven and digged up a pit.   --Ps. vii. 16
                                                  (Book of
                                                  Common
                                                  Prayer).
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   2. To carve or cut, as letters or figures, on some hard
      substance; to engrave.
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            Thou shalt take two onyx stones, and grave on them
            the names of the children of Israel.  --Ex. xxviii.
                                                  9.
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   3. To carve out or give shape to, by cutting with a chisel;
      to sculpture; as, to grave an image.
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            With gold men may the hearte grave.   --Chaucer.
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   4. To impress deeply (on the mind); to fix indelibly.
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            O! may they graven in thy heart remain. --Prior.
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   5. To entomb; to bury. [Obs.] --Chaucer.
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            Lie full low, graved in the hollow ground. --Shak.
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The Collaborative International Dictionary of English v.0.48:

-grave \-grave\
   A final syllable signifying a ruler, as in landgrave,
   margrave. See Margrave.
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The Collaborative International Dictionary of English v.0.48:

Grave \Grave\, v. t. (Naut.)
   To clean, as a vessel's bottom, of barnacles, grass, etc.,
   and pay it over with pitch; -- so called because graves or
   greaves was formerly used for this purpose.
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The Collaborative International Dictionary of English v.0.48:

Grave \Grave\, a. [Compar. Graver (gr[=a]v"[~e]r); superl.
   Gravest.] [F., fr. L. gravis heavy; cf. It. & Sp. grave
   heavy, grave. See Grief.]
   1. Of great weight; heavy; ponderous. [Obs.]
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            His shield grave and great.           --Chapman.
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   2. Of importance; momentous; weighty; influential; sedate;
      serious; -- said of character, relations, etc.; as, grave
      deportment, character, influence, etc.
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            Most potent, grave, and reverend seigniors. --Shak.
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            A grave and prudent law, full of moral equity.
                                                  --Milton.
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   3. Not light or gay; solemn; sober; plain; as, a grave color;
      a grave face.
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   4. (Mus.)
      (a) Not acute or sharp; low; deep; -- said of sound; as, a
          grave note or key.
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                The thicker the cord or string, the more grave
                is the note or tone.              --Moore
                                                  (Encyc. of
                                                  Music).
      (b) Slow and solemn in movement.
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   Grave accent. (Pron.) See the Note under Accent, n., 2.

   Syn: Solemn; sober; serious; sage; staid; demure; thoughtful;
        sedate; weighty; momentous; important.

   Usage: Grave, Sober, Serious, Solemn. Sober supposes
          the absence of all exhilaration of spirits, and is
          opposed to gay or flighty; as, sober thought. Serious
          implies considerateness or reflection, and is opposed
          to jocose or sportive; as, serious and important
          concerns. Grave denotes a state of mind, appearance,
          etc., which results from the pressure of weighty
          interests, and is opposed to hilarity of feeling or
          vivacity of manner; as, a qrave remark; qrave attire.
          Solemn is applied to a case in which gravity is
          carried to its highest point; as, a solemn admonition;
          a solemn promise.
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The Collaborative International Dictionary of English v.0.48:

Grave \Grave\, v. i.
   To write or delineate on hard substances, by means of incised
   lines; to practice engraving.
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The Collaborative International Dictionary of English v.0.48:

Grave \Grave\, n. [AS. gr?f, fr. grafan to dig; akin to D. & OS.
   graf, G. grab, Icel. gr["o]f, Russ. grob' grave, coffin. See
   Grave to carve.]
   An excavation in the earth as a place of burial; also, any
   place of interment; a tomb; a sepulcher. Hence: Death;
   destruction.
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         He bad lain in the grave four days.      --John xi. 17.
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   Grave wax, adipocere.
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WordNet (r) 3.0 (2006):

grave
    adj 1: dignified and somber in manner or character and committed
           to keeping promises; "a grave God-fearing man"; "a quiet
           sedate nature"; "as sober as a judge"; "a solemn
           promise"; "the judge was solemn as he pronounced
           sentence" [syn: grave, sedate, sober, solemn]
    2: causing fear or anxiety by threatening great harm; "a
       dangerous operation"; "a grave situation"; "a grave illness";
       "grievous bodily harm"; "a serious wound"; "a serious turn of
       events"; "a severe case of pneumonia"; "a life-threatening
       disease" [syn: dangerous, grave, grievous, serious,
       severe, life-threatening]
    3: of great gravity or crucial import; requiring serious
       thought; "grave responsibilities"; "faced a grave decision in
       a time of crisis"; "a grievous fault"; "heavy matters of
       state"; "the weighty matters to be discussed at the peace
       conference" [syn: grave, grievous, heavy, weighty]
    n 1: death of a person; "he went to his grave without forgiving
         me"; "from cradle to grave"
    2: a place for the burial of a corpse (especially beneath the
       ground and marked by a tombstone); "he put flowers on his
       mother's grave" [syn: grave, tomb]
    3: a mark (`) placed above a vowel to indicate pronunciation
       [syn: grave accent, grave]
    v 1: shape (a material like stone or wood) by whittling away at
         it; "She is sculpting the block of marble into an image of
         her husband" [syn: sculpt, sculpture, grave]
    2: carve, cut, or etch into a material or surface; "engrave a
       pen"; "engraved the trophy cupt with the winner's"; "the
       lovers scratched their names into the bark of the tree" [syn:
       scratch, engrave, grave, inscribe]

The Devil's Dictionary (1881-1906):

GRAVE, n.  A place in which the dead are laid to await the coming of
the medical student.

    Beside a lonely grave I stood --
        With brambles 'twas encumbered;
    The winds were moaning in the wood,
        Unheard by him who slumbered,

    A rustic standing near, I said:
        "He cannot hear it blowing!"
    "'Course not," said he:  "the feller's dead --
        He can't hear nowt [sic] that's going."

    "Too true," I said; "alas, too true --
        No sound his sense can quicken!"
    "Well, mister, wot is that to you? --
        The deadster ain't a-kickin'."

    I knelt and prayed:  "O Father, smile
        On him, and mercy show him!"
    That countryman looked on the while,
        And said:  "Ye didn't know him."
                                                         Pobeter Dunko