see also:
On Behalf of vs. in Behalf of: Usage Guide
A body of opinion favors in with the "interest, benefit" sense of behalf and on with the "support, defense" sense. This distinction has been observed by some writers but overall has never had a sound basis in actual usage. In current British use, on behalf (of) has replaced in behalf (of); both are still used in American English, but the distinction is frequently not observed.
on behalf of
2 of 2phrase
variants
or on someone's behalf
1
also US in behalf of someone
or in someone's behalf
: as a representative of someone
The teacher accepted the award on behalf of the class. = The teacher accepted the award on the class's behalf.
2
also US in behalf of someone
or in someone's behalf
: for the benefit of someone : in support of someone
She spoke in behalf of the other candidate.
They're willing to do anything on their child's behalf.
3
: because of someone : to please someone
Don't get up on my behalf.
Cite this Entry
“Behalf.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/behalf. Accessed 11 Nov. 2026.
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