Source : Webster's Revised Unabridged Dictionary (1913)

Buxom \Bux"om\, a. [OE. buxum, boxom, buhsum, pliable, obedient,
   AS. b[=o]csum, b[=u]hsum (akin to D. buigzaam blexible, G.
   biegsam); b[=u]gan to bow, bend + -sum, E. -some. See {Bow}
   to bend, and {-some}.]
   1. Yielding; pliable or compliant; ready to obey; obedient;
      tractable; docile; meek; humble. [Obs.]

            So wild a beast, so tame ytaught to be, And buxom to
            his bands, is joy to see.             --Spenser.

            I submit myself unto this holy church of Christ, to
            be ever buxom and obedient to the ordinance of it.
                                                  --Foxe.

   2. Having the characteristics of health, vigor, and
      comeliness, combined with a gay, lively manner; stout and
      rosy; jolly; frolicsome.

            A daughter fair, So buxom, blithe, and debonair.
                                                  --Milton.

            A parcel of buxom bonny dames, that were laughing,
            singing, dancing, and as merry as the day was long.
                                                  --Tatler.
      -- {Bux"om*ly}, adv. -- {Bux"om*ness}, n.

Source : WordNet®

buxom
     adj 1: (of a woman's body) having a large bosom and pleasing
            curves; "Hollywood seems full of curvaceous blondes";
            "a curvy young woman in a tight dress" [syn: {bosomy},
             {busty}, {curvaceous}, {curvy}, {full-bosomed}, {sonsie},
             {sonsy}, {voluptuous}, {well-endowed}]
     2: euphemisms for slightly fat; "a generation ago...buxom
        actresses were popular"- Robt.A.Hamilton; "chubby babies";
        "pleasingly plump" [syn: {chubby}, {embonpoint}, {plump},
        {zaftig}, {zoftig}]