Source : Webster's Revised Unabridged Dictionary (1913)

Stamp \Stamp\v. t. [imp. & p. p. {Stamped}; p. pr. & vb. n.
   {Stamping}.] [OE. stampen; akin to LG. & D. stampen, G.
   stampfen, OHG. stanpf?n, Dan. stampe, Sw. stampa, Icel.
   stappa, G. stampf a pestle and E. step. See {Step}, v. i.,
   and cf. {Stampede}.]
   1. To strike beat, or press forcibly with the bottom of the
      foot, or by thrusting the foot downward. --Shak.

            He frets, he fumes, he stares, he stamps the ground.
                                                  --Dryden.

   2. To bring down (the foot) forcibly on the ground or floor;
      as, he stamped his foot with rage.

   3. To crush; to pulverize; specifically (Metal.), to crush by
      the blow of a heavy stamp, as ore in a mill.

            I took your sin, the calf which ye had made, and
            burnt it with fire, and stamped it, and ground it
            very small.                           --Deut. ix.
                                                  21.

   4. To impress with some mark or figure; as, to stamp a plate
      with arms or initials.

   5. Fig.: To impress; to imprint; to fix deeply; as, to stamp
      virtuous principles on the heart.

            God . . . has stamped no original characters on our
            minds wherein we may read his being.  --Locke.

   6. To cut out, bend, or indent, as paper, sheet metal, etc.,
      into various forms, by a blow or suddenly applied pressure
      with a stamp or die, etc.; to mint; to coin.

   7. To put a stamp on, as for postage; as, to stamp a letter;
      to stamp a legal document.

   {To stamp out}, to put an end to by sudden and energetic
      action; to extinguish; as, to stamp out a rebellion.

Stamp \Stamp\, n.
   1. The act of stamping, as with the foot.

   2. The which stamps; any instrument for making impressions on
      other bodies, as a die.

            'T is gold so pure It can not bear the stamp without
            alloy.                                --Dryden.

   3. The mark made by stamping; a mark imprinted; an
      impression.

            That sacred name gives ornament and grace, And, like
            his stamp, makes basest metals pass.  --Dryden.

   4. that which is marked; a thing stamped.

            hanging a golden stamp about their necks. --Shak.

   5. [F. estampe, of german origin. See {Stamp}, v. t.] A
      picture cut in wood or metal, or made by impression; a
      cut; a plate. [Obs.]

            At Venice they put out very curious stamps of the
            several edifices which are most famous for their
            beauty and magnificence.              --Addison.

   6. An offical mark set upon things chargeable with a duty or
      tax to government, as evidence that the duty or tax is
      paid; as, the stamp on a bill of exchange.

   7. Hence, a stamped or printed device, issued by the
      government at a fixed price, and required by law to be
      affixed to, or stamped on, certain papers, as evidence
      that the government dues are paid; as, a postage stamp; a
      receipt stamp, etc.

   8. An instrument for cutting out, or shaping, materials, as
      paper, leather, etc., by a downward pressure.

   9. A character or reputation, good or bad, fixed on anything
      as if by an imprinted mark; current value; authority; as,
      these persons have the stamp of dishonesty; the Scriptures
      bear the stamp of a divine origin.

            Of the same stamp is that which is obtruded on us,
            that an adamant suspends the attraction of the
            loadstone.                            --Sir T.
                                                  Browne.

   10. Make; cast; form; character; as, a man of the same stamp,
       or of a different stamp.

             A soldier of this season's stamp.    --Shak.

   11. A kind of heavy hammer, or pestle, raised by water or
       steam power, for beating ores to powder; anything like a
       pestle, used for pounding or bathing.

   12. A half-penny. [Obs.] --au. & Fl.

   13. pl. Money, esp. paper money. [Slang, U.S.]

   {Stamp act}, an act of the British Parliament [1765] imposing
      a duty on all paper, vellum, and parchment used in the
      American colonies, and declaring all writings on unstamped
      materials to be null an void.

   {Stamp collector}, an officer who receives or collects stamp
      duties; one who collects postage or other stamps.

   {Stamp duty}, a duty, or tax, imposed on paper and parchment
      used for certain writings, as deeds, conveyances, etc.,
      the evidence of the payment of the duty or tax being a
      stamp. [Eng.]

   {Stamp hammer}, a hammer, worked by power, which rises and
      falls vertically, like a stamp in a stamp mill.

   {Stamp head}, a heavy mass of metal, forming the head or
      lower end of a bar, which is lifted and let fall, in a
      stamp mill.

   {Stamp mill} (Mining), a mill in which ore is crushed with
      stamps; also, a machine for stamping ore.

   {Stamp note}, a stamped certificate from a customhouse
      officer, which allows goods to be received by the captain
      of a ship as freight. [Eng.]

   {Stamp office}, an office for the issue of stamps and the
      reception of stamp duties.

Stamp \Stamp\, v. i.
   1. To strike; to beat; to crush.

            These cooks how they stamp and strain and grind.
                                                  --Chaucer.

   2. To strike the foot forcibly downward.

            But starts, exclaims, and stamps, and raves, and
            dies.                                 --dennis.

Source : WordNet®

stamp
     v 1: walk heavily; "The men stomped through the snow in their
          heavy boots" [syn: {stomp}, {stump}]
     2: to mark, or produce an imprint in or on something; "a man
        whose name is permanently stamped on our maps"
     3: reveal clearly as having a certain character; "His playing
        stamps him as a Romantic"
     4: affix a stamp to; "Are the letters properly stamped?"
     5: treat or classify according to a mental stereotype; "I was
        stereotyped as a lazy Southern European" [syn: {pigeonhole},
         {stereotype}]
     6: destroy or extinguish as if by stamping with the foot;
        "Stamp fascism into submission"; "stamp out tyranny"
     7: form or cut out with a mold, form, or die; "stamp needles"
     8: crush or grind with a heavy instrument; "stamp fruit extract
        the juice"
     9: raise in a relief; "embossed stationary" [syn: {emboss}, {boss}]

stamp
     n 1: a token that postal fees have been paid [syn: {postage}, {postage
          stamp}]
     2: the distinctive form in which a thing is made; "pottery of
        this cast was found throughout the region" [syn: {cast}, {mold}]
     3: a type or class; "more men of his stamp are needed"
     4: a symbol that is the result of printing; "he put his stamp
        on the envelope" [syn: {impression}]
     5: machine consisting of a heavy bar that moves vertically for
        pounding or crushing ores [syn: {pestle}]
     6: a block or die used to imprint a mark or design
     7: a device incised to make an impression; used to secure a
        closing or to authenticate documents [syn: {seal}]