Definition of "on behalf of" [on behalf of]

• Speaking or acting for. (preposition)

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• "Now the book is coming out in the States and Soho Press must have gotten wind of my exploits as the Herring Wonder and challenged me on behalf of Davidson."
• "Channel 4 News reported that Brooks was confronted by the Met in 2002 about the fact a senior detective investigating the murder of a private investigator, Daniel Morgan, was targeted by Mulcaire on behalf of the News of the World."
• "Towards the end of his reign he encouraged the efforts made on behalf of the Catholic public schools by the provost Felbiger, and those for the Protestants by Freiherr von Zedlitz and the cathedral canon"