The Collaborative International Dictionary of English v.0.48:

Sawhorse \Saw"horse`\, n.
   A kind of rack, shaped like a double St. Andrew's cross, on
   which sticks of wood are laid for sawing by hand; -- called
   also buck, and sawbuck.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Buck \Buck\ (b[u^]k), n. [Akin to LG. b["u]ke, Dan. byg, Sw.
   byk, G. bauche: cf. It. bucato, Prov. Sp. bugada, F.
   bu['e]e.]
   1. Lye or suds in which cloth is soaked in the operation of
      bleaching, or in which clothes are washed.
      [1913 Webster]

   2. The cloth or clothes soaked or washed. [Obs.] --Shak.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Buck \Buck\, v. t. [imp. & p. p. Bucked (b[u^]kt); p. pr. &
   vb. n. Bucking.] [OE. bouken; akin to LG. b["u]ken, Dan.
   byge, Sw. byka, G. bauchen, beuchen; cf. OF. buer. Cf. the
   preceding noun.]
   1. To soak, steep, or boil, in lye or suds; -- a process in
      bleaching.
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   2. To wash (clothes) in lye or suds, or, in later usage, by
      beating them on stones in running water.
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   3. (Mining) To break up or pulverize, as ores.
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The Collaborative International Dictionary of English v.0.48:

Buck \Buck\ (b[u^]k), v. i.
   1. To copulate, as bucks and does.
      [1913 Webster]

   2. To spring with quick plunging leaps, descending with the
      fore legs rigid and the head held as low down as possible;
      -- said of a vicious horse or mule.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Buck \Buck\, v. t.
   1. (Mil.) To subject to a mode of punishment which consists
      in tying the wrists together, passing the arms over the
      bent knees, and putting a stick across the arms and in the
      angle formed by the knees.
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   2. To throw by bucking. See Buck, v. i., 2.
      [1913 Webster]

            The brute that he was riding had nearly bucked him
            out of the saddle.                    --W. E.
                                                  Norris.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Buck \Buck\ (b[u^]k), n. [OE. buk, bucke, AS. bucca, bua,
   he-goat; akin to D. bok, OHG. pocch, G. bock, Ir. boc, W.
   bwch, Corn. byk; cf. Zend b[=u]za, Skr. bukka. [root]256. Cf.
   Butcher, n.]
   1. The male of deer, especially fallow deer and antelopes, or
      of goats, sheep, hares, and rabbits.
      [1913 Webster]

   Note: A male fallow deer is called a fawn in his first year;
         a pricket in his second; a sorel in his third; a sore
         in his fourth; a buck of the first head in his fifth;
         and a great buck in his sixth. The female of the fallow
         deer is termed a doe. The male of the red deer is
         termed a stag or hart and not a buck, and the female is
         called a hind. --Brande & C.
         [1913 Webster]

   2. A gay, dashing young fellow; a fop; a dandy.
      [1913 Webster]

            The leading bucks of the day.         --Thackeray.
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   3. A male Indian or negro. [Colloq. U.S.]
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   Note: The word buck is much used in composition for the names
         of antelopes; as, bush buck, spring buck.
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   Blue buck. See under Blue.

   Water buck, a South African variety of antelope (Kobus
      ellipsiprymnus). See Illust. of Antelope.
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The Collaborative International Dictionary of English v.0.48:

Buck \Buck\, n.
   A frame on which firewood is sawed; a sawhorse; a sawbuck.
   [1913 Webster]

   Buck saw, a saw set in a frame and used for sawing wood on
      a sawhorse.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Buck \Buck\, n. [See Beech, n.]
   The beech tree. [Scot.]
   [1913 Webster]

   Buck mast, the mast or fruit of the beech tree. --Johnson.
      [1913 Webster]

WordNet (r) 3.0 (2006):

buck
    n 1: a gymnastic horse without pommels and with one end
         elongated; used lengthwise for vaulting [syn: vaulting
         horse, long horse, buck]
    2: a piece of paper money worth one dollar [syn: dollar,
       dollar bill, one dollar bill, buck, clam]
    3: United States author whose novels drew on her experiences as
       a missionary in China (1892-1973) [syn: Buck, Pearl Buck,
       Pearl Sydenstricker Buck]
    4: a framework for holding wood that is being sawed [syn:
       sawhorse, horse, sawbuck, buck]
    5: mature male of various mammals (especially deer or antelope)
    v 1: to strive with determination; "John is bucking for a
         promotion"
    2: resist; "buck the trend" [syn: buck, go against]
    3: move quickly and violently; "The car tore down the street";
       "He came charging into my office" [syn: tear, shoot,
       shoot down, charge, buck]
    4: jump vertically, with legs stiff and back arched; "the yung
       filly bucked" [syn: buck, jerk, hitch]