In behalf of For the benefit of; in the interest of.(idiom)
On behalf of As the agent of; on the part of.(idiom)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "behalf" in a sentence
"The manifestation of love God makes in our behalf is a communication of the love that He Himself is."
"We are the ones who are muddling through and getting crapped on by the media all the time and harped to raise our kids right and blamed if they don't turn out to be perfect little citizens, so yes, a little push back on our behalf is welcome."
"I picked the easiest and most obvious evidence in behalf of ID for that illustration."