'Groomsman' definitions:
Definition of 'groomsman'
From: WordNet
noun
A male attendant of the bridegroom at a wedding
Definition of 'Groomsman'
From: GCIDE
- Groomsman \Grooms"man\, n.; pl. Groomsmen. A male attendant of a bridegroom at his wedding; -- the chief attendant is also called the best man; -- the correlative of bridesmaid. [1913 Webster]