1. in the interest of or as a representative of someone or something
Usage: typically used in the phrases ‘on behalf of’ or ‘on someone’s behalf’

Examples

• She spoke on behalf of the entire committee.
• The lawyer acted on his client’s behalf during the trial.
• I’m calling on behalf of the charity organization.
• The ambassador negotiated on behalf of his country.
• Thank you for donating on behalf of our family.
• The union representative spoke on behalf of all workers.