on behalf of vs. in behalf of
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.
Origin and Etymology of behalf
Middle English, from by + half half, side
First Known Use: 14th century
BEHALF Defined for Kids
Definition of behalf for Students
: a person's interest or support <He argued in my behalf.>
on behalf ofor
in behalf of
1 : in the interest of <I speak in behalf of my friend.>
2 : as a representative of <I accepted the award on behalf of the whole class.>
Seen and Heard
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