1. an official in charge of a government department or public service
2. a person appointed to a commission or committee with specific duties
3. the head of a professional sports league
Usage: sports

Examples

• The police commissioner announced new safety measures.
• She was appointed as a commissioner on the housing authority.
• The baseball commissioner suspended the player for violating league rules.
• The fire commissioner investigated the cause of the blaze.
• Three commissioners voted against the proposed budget.
• The health commissioner issued a public warning about the outbreak.
• He served as commissioner of the parks department for ten years.