Definition of behalf (noun)
- as the agent of or on someone's part (usually expressed a
- "on behalf of" rather than "in behalf of"); "the guardian signed the contract on behalf of the minor child"; "this letter is written on behalf of my client";
- for someone's benefit (usually expressed as `in behalf' rather than `on behalf' and usually with a possessive)
- "in your behalf"; "campaigning in his own behalf"; "spoke a good word in his friend's behalf"
Source: Princeton University Wordnet