The Collaborative International Dictionary
Behalf \Be*half"\, n. [OE. on-behalve in the name of, bihalven by the side of, fr. AS. healf half, also side, part: akin to G. halb half, halber on account of. See Be-, and Half, n.] Advantage; favor; stead; benefit; interest; profit; support; defense; vindication.
In behalf of his mistress's beauty.
--Sir P.
Sidney.
Against whom he had contracted some prejudice in behalf
of his nation.
--Clarendon.
In behalf of, in the interest of.
On behalf of, on account of; on the part of.
Wiktionary
prep. Speaking or acting for.
Usage examples of "on behalf of".
Whence also, on behalf of myself and of all commended to me in prayer, I offer and present unto Thee the jubilation of all devout hearts, their ardent affections, their mental ecstasies, and supernatural illuminations and heavenly visions, with all the virtues and praises celebrated and to be celebrated by every creature in heaven and earth.
That's her right, of course, as accuser speaking on behalf of a dead person.
I'll be acting on behalf of myself, not an established transport company, so they will be more inclined to see this as a way of accomplishing what they need without suspending their morass of restrictions.
Stern's book, written on behalf of the American Jewish Committee with the tacit approval of the Anti-Defamation League (ADL) of the B'Nai B'rith, seeks to completely discredit all factions of the emerging Patriot and Militia movements.
The ceremony was simple, and brief, the only oddity being thatArakasi swore on behalf of his agents also.
Starfleet has instructed us to attend this auction and bid on behalf of the Federation.