1 : as the agent of or on someone's part (usually expressed as -"on behalf of-" rather than -"in behalf of-");
2 : the act of bearing the weight of or strengthening
3 : active support of an idea or cause etc.; especially the act of pleading or arguing for something
4 : the activity of providing for or maintaining by supplying with money or necessities
5 : financial resources provided to make some project possible
6 : the act of accepting with approval; favorable reception
1 : be a regular customer or client of