behalf

noun

be·​half bi-ˈhaf 

-ˈhäf, 

bē-

: interest, benefit

also : support, defense

argued in his behalf

see also:

on behalf of

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.

Examples of behalf in a Sentence

Recent Examples on the Web

Though he wasn't involved in their case, Chief Borges reached out to Denise on Instagram to apologize on behalf of all law enforcement. —Lauren Clark, CBS News, 29 Mar. 2026

This essay was written on behalf of the State Historical Society of Iowa. —Kate Levasseur, Des Moines Register, 29 Mar. 2026

The National Low Income Housing Coalition advocates on behalf of people with the lowest incomes, whose access to affordable, quality housing is especially challenging in today’s economy. —Bob Woods, CNBC, 29 Mar. 2026

Owens made the case that under the stadium incentive package approved by lawmakers in 2024 and the tentative STAR bond agreement negotiated by Toland on behalf of the state, rejecting the sports authority bill would only give the executive branch more control over the project. —Matthew Kelly, Kansas City Star, 28 Mar. 2026

Word History

Etymology

Middle English, from by + half half, side

First Known Use

14th century, in the meaning defined above

Phrases Containing behalf

• in behalf of someone
• in someone's behalf
• on behalf of
• on behalf of someone
• on someone's behalf

Rhymes for behalf

• carafe
• digraph
• distaff
• falstaff
• giraffe
• subgraph
• autograph
• biograph
• cenotaph
• chronograph
• epigraph
• epitaph

Kids Definition

behalf

noun

be·​half bi-ˈhaf 

-ˈhȧf

: useful aid : support

spoke in my behalf