As Against; As Between
Black's Law Dictionary · Henry Campbell Black, M.A. · 1910
Black's Law Dictionary
These words contrast the relative position of two persons, with a tacit reference to a different relationship between one of them and a third person. For instance, the temporary bailee of a chattel is entitled to it as between himself and a stranger or as against a stranger; referenco being made by this form of words to the rights of the balior.
Wharton.