Source : Webster's Revised Unabridged Dictionary (1913)

Buff \Buff\, a.
   1. Made of buff leather. --Goldsmith.

   2. Of the color of buff.

   {Buff coat}, a close, military outer garment, with short
      sleeves, and laced tightly over the chest, made of buffalo
      skin, or other thick and elastic material, worn by
      soldiers in the 17th century as a defensive covering.

   {Buff jerkin}, originally, a leather waistcoat; afterward,
      one of cloth of a buff color. [Obs.] --Nares.

   {Buff stick} (Mech.), a strip of wood covered with buff
      leather, used in polishing.

Buff \Buff\, v. t.
   To polish with a buff. See {Buff}, n., 5.

Buff \Buff\, v. t. [OF. bufer to cuff, buffet. See {Buffet} a
   blow.]
   To strike. [Obs.] --B. Jonson.

Buff \Buff\, n. [See {Buffet}.]
   A buffet; a blow; -- obsolete except in the phrase
   ``Blindman's buff.''

         Nathless so sore a buff to him it lent That made him
         reel.                                    --Spenser.

Buff \Buff\ (b[u^]f), n. [OE. buff, buffe, buff, buffalo, F.
   buffle buffalo. See {Buffalo}.]
   1. A sort of leather, prepared from the skin of the buffalo,
      dressed with oil, like chamois; also, the skins of oxen,
      elks, and other animals, dressed in like manner. ``A suit
      of buff.'' --Shak.

   2. The color of buff; a light yellow, shading toward pink,
      gray, or brown.

            A visage rough, Deformed, unfeatured, and a skin of
            buff.                                 --Dryden.

   3. A military coat, made of buff leather. --Shak.

   4. (Med.) The grayish viscid substance constituting the buffy
      coat. See {Buffy coat}, under {Buffy}, a.

   5. (Mech.) A wheel covered with buff leather, and used in
      polishing cutlery, spoons, etc.

   6. The bare skin; as, to strip to the buff. [Colloq.]

            To be in buff is equivalent to being naked.
                                                  --Wright.

Buff \Buff\, a. [Of uncertain etymol.]
   Firm; sturdy.

         And for the good old cause stood buff, 'Gainst many a
         bitter kick and cuff.                    --Hudibras.

Source : WordNet®

buff
     adj : of the color of buff leather

buff
     n 1: an ardent follower and admirer [syn: {fan}, {devotee}, {lover}]
     2: a soft thick undyed leather from the skins of e.g. buffalo
        or oxen
     3: bare skin; "swimming in the buff"
     4: a medium to dark tan color [syn: {yellowish brown}, {raw
        sienna}, {caramel}, {caramel brown}]
     5: an implement consisting of soft material mounted on a block;
        used for polishing (as in manicuring) [syn: {buffer}]

buff
     v 1: strike, beat repeatedly; "The wind buffeted him" [syn: {buffet}]
     2: polish and make shiny; "buff the wooden floors"; "buff my
        shoes" [syn: {burnish}, {furbish}, {flush}]