Meaning of the word "chief groomsman" in English

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

chief groomsman

US /tʃiːf ˈɡruːmsmən/
UK /tʃiːf ˈɡruːmsmən/

Noun

the principal groomsman at a wedding, usually the groom's best friend or brother

Example:
My brother was my chief groomsman at my wedding.
The chief groomsman is responsible for organizing the bachelor party.