Bridegroom

n. man who is engaged to be married, man who is about to be married

A bridegroom (often shortened to groom) is a man who is about to be married, or who has just been married. A groom is defined as a personal hand servant much like a valet. Therefore the "Bride's Groom" is correctly defined as the bride's personal hand servant.He is typically attended by a best man and groomsmen. His partner, if female, is known as the bride, who is typically attended by one or more bridesmaids and a maid or matron of honor. The groom will after that ceremony be called a husband of his new spouse. The term "groom" has the Indogermanic root of "earth" (for "ghmún"), which evolved into Latin humanus and Germanic and English "man" and "groom".
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Noun
1. a man who has recently been married
(synonym) groom
(hypernym) newlywed, honeymooner
2. a man participant in his own marriage ceremony
(synonym) groom
(hypernym) participant
(member-holonym) wedding, wedding party

(n.)
A man newly married, or just about to be married.
  

spouse; bridegroom