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®

buxomness
     n : the bodily property of being attractively plump and vigorous
         and (of women) full bosomed