Is it farther or further?
A person or company that intervenes to thwart a hostile takeover bid: Miami firm calls $1.6 billion bid ''inadequate''; seeks white knight for rescue
[1981+; fr the White Knight in Lewis Carroll's Through the Looking Glass]
A person or thing on which hopes are based
[1911+; fr a white boxer who might beat Jack Johnson, the first black boxer to be world heavyweight champion (1908–15)]