Source : Webster's Revised Unabridged Dictionary (1913)

Grind \Grind\, v. t. [imp. & p. p. {Ground}; p. pr. & vb. n.
   {Grinding}.] [AS. grindan; perh. akin to L. frendere to
   gnash, grind. Cf. {Grist}.]
   1. To reduce to powder by friction, as in a mill, or with the
      teeth; to crush into small fragments; to produce as by the
      action of millstones.

            Take the millstones, and grind meal.  --Is. xivii.
                                                  2.

   2. To wear down, polish, or sharpen, by friction; to make
      smooth, sharp, or pointed; to whet, as a knife or drill;
      to rub against one another, as teeth, etc.

   3. To oppress by severe exactions; to harass.

            To grind the subject or defraud the prince.
                                                  --Dryden.

   4. To study hard for examination. [College Slang]

Grind \Grind\, v. i.
   1. To perform the operation of grinding something; to turn
      the millstones.

            Send thee Into the common prison, there to grind.
                                                  --Milton.

   2. To become ground or pulverized by friction; as, this corn
      grinds well.

   3. To become polished or sharpened by friction; as, glass
      grinds smooth; steel grinds to a sharp edge.

   4. To move with much difficulty or friction; to grate.

   5. To perform hard aud distasteful service; to drudge; to
      study hard, as for an examination. --Farrar.

Grind \Grind\, n.
   1. The act of reducing to powder, or of sharpening, by
      friction.

   2. Any severe continuous work or occupation; esp., hard and
      uninteresting study. [Colloq.] --T. Hughes.

   3. A hard student; a dig. [College Slang]

Source : WordNet®

grind
     n 1: an insignificant student who is ridiculed as being affected
          or studying excessively [syn: {swot}, {nerd}, {wonk}, {dweeb}]
     2: hard monotonous routine work [syn: {drudgery}, {plodding}, {donkeywork}]
     3: the act of grinding to a powder or dust [syn: {mill}, {pulverization},
         {pulverisation}]
     [also: {ground}]

grind
     v 1: press or grind with a crunching noise [syn: {crunch}, {cranch},
           {craunch}]
     2: make a grating or grinding sound by rubbing together; "grate
        one's teeth in anger" [syn: {grate}]
     3: reduce to small pieces or particles by pounding or abrading;
        "grind the spices in a mortar"; "mash the garlic" [syn: {mash},
         {crunch}, {bray}, {comminute}]
     4: work hard; "She was digging away at her math homework";
        "Lexicographers drudge all day long" [syn: {labor}, {labour},
         {toil}, {fag}, {travail}, {drudge}, {dig}, {moil}]
     5: dance by rotating the pelvis in an erotically suggestive
        way, often while in contact with one's partner such that
        the dancers' legs are interlaced
     [also: {ground}]

Source : Free On-Line Dictionary of Computing

GRIND
     
        GRaphical INterpretive Display.
     
        A graphics input language for the {PDP-9}.
     
        ["GRIND: A Language and Translator for Computer Graphics",
        A.P. Conn, Dartmouth, June 1969].
     
        [{Jargon File}]
     
        (1995-01-31)

grind
     
        1. (MIT and Berkeley) To prettify hardcopy of code, especially
        LISP code, by reindenting lines, printing keywords and
        comments in distinct fonts (if available), etc.  This usage
        was associated with the MacLISP community and is now rare;
        {prettyprint} was and is the generic term for such operations.
     
        2. (Unix) To generate the formatted version of a document from
        the {nroff}, {troff}, {TeX}, or Scribe source.
     
        3. To run seemingly interminably, especially (but not
        necessarily) if performing some tedious and inherently useless
        task.  Similar to {crunch} or {grovel}.  Grinding has a
        connotation of using a lot of CPU time, but it is possible to
        grind a disk, network, etc.
     
        See also {hog}.
     
        4. To make the whole system slow.  "Troff really grinds a
        PDP-11."
     
        5. "grind grind" excl. Roughly, "Isn't the machine slow
        today!"
     
        [{Jargon File}]
     
        (1994-12-16)