Source : Webster's Revised Unabridged Dictionary (1913)

Blunt \Blunt\, a. [Cf. Prov. G. bludde a dull or blunt knife,
   Dan. blunde to sleep, Sw. & Icel. blunda; or perh. akin to E.
   blind.]
   1. Having a thick edge or point, as an instrument; dull; not
      sharp.

            The murderous knife was dull and blunt. --Shak.

   2. Dull in understanding; slow of discernment; stupid; --
      opposed to {acute}.

            His wits are not so blunt.            --Shak.

   3. Abrupt in address; plain; unceremonious; wanting the forms
      of civility; rough in manners or speech. ``Hiding his
      bitter jests in blunt behavior.'' ``A plain, blunt man.''
      --Shak.

   4. Hard to impress or penetrate. [R.]

            I find my heart hardened and blunt to new
            impressions.                          --Pope.

   Note: Blunt is much used in composition, as blunt-edged,
         blunt-sighted, blunt-spoken.

   Syn: Obtuse; dull; pointless; curt; short; coarse; rude;
        brusque; impolite; uncivil.

Blunt \Blunt\, v. t. [imp. & p. p. {Blunted}; p. pr. & vb. n.
   {Blunting}.]
   1. To dull the edge or point of, by making it thicker; to
      make blunt. --Shak.

   2. To repress or weaken, as any appetite, desire, or power of
      the mind; to impair the force, keenness, or
      susceptibility, of; as, to blunt the feelings.

Blunt \Blunt\, n.
   1. A fencer's foil. [Obs.]

   2. A short needle with a strong point. See {Needle}.

   3. Money. [Cant] --Beaconsfield.

Source : WordNet®

blunt
     adj 1: having a broad or rounded end; "thick marks made by a blunt
            pencil"
     2: used of a knife or other blade; not sharp; "a blunt
        instrument"
     3: characterized by directness in manner or speech; without
        subtlety or evasion; "blunt talking and straight
        shooting"; "a blunt New England farmer"; "I gave them my
        candid opinion"; "forthright criticism"; "a forthright
        approach to the problem"; "tell me what you think--and you
        may just as well be frank"; "it is possible to be
        outspoken without being rude"; "plainspoken and to the
        point"; "a point-blank accusation" [syn: {candid}, {forthright},
         {frank}, {free-spoken}, {outspoken}, {plainspoken}, {point-blank},
         {straight-from-the-shoulder}]
     4: devoid of any qualifications or disguise or adornment; "the
        blunt truth"; "the crude facts"; "facing the stark reality
        of the deadline" [syn: {crude(a)}, {stark(a)}]

blunt
     v 1: make less intense; "blunted emotions"
     2: make numb or insensitive; "The shock numbed her senses"
        [syn: {numb}, {benumb}, {dull}]
     3: make dull or blunt; "Too much cutting dulls the knife's
        edge" [syn: {dull}] [ant: {sharpen}]
     4: make less sharp; "blunt the knives"
     5: make less lively, intense, or vigorous; impair in vigor,
        force, activity, or sensation; "Terror blunted her
        feelings"; "deaden a sound" [syn: {deaden}] [ant: {enliven}]