What is In Autre Droit?

Legal Definition
In another's right. An executor, administrator or trustee, is said to have the property confided to him in such character, in autre droit.
-- Bouviers Law Dictionary
Legal Definition
In Fr. In another's right. As representing another. An executor, administrator, or trustee sues in autre droit.
-- Black's Law Dictionary
Legal Definition
In the right of another.
-- Ballentine's Law Dictionary