Meaning of the word groomsman in English

What does groomsman mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

groomsman

US /ˈɡruːmz.mən/
UK /ˈɡruːmz.mən/

Noun

a male friend or relative who attends the groom at a wedding

Example:
My brother asked me to be his best groomsman.
The groomsmen wore matching suits.