Source : Webster's Revised Unabridged Dictionary (1913)

Bridegroom \Bride"groom`\ (-gr[=oo]m`), n. [OE. bridegome,
   brudgume, AS. br[=y]dguma (akin to OS. br[=u]digumo, D.
   bruidegom, bruigom, OHG. pr[=u]tigomo, MHG. briutegome, G.
   br["a]utigam); AS. br[=y]d bride + guma man, akin to Goth.
   guma, Icel. gumi, OHG. gomo, L. homo; the insertion of r
   being caused by confusion with groom. See {Bride}, and cf.
   {Groom}, {Homage}.]
   A man newly married, or just about to be married.

Source : WordNet®

bridegroom
     n 1: a man who has recently been married [syn: {groom}]
     2: a man participant in his own marriage ceremony [syn: {groom}]