In a lesbian couple, the nonbirth mother (partner of the birth mother) of a child, especially one who takes an equal role in mothering the child.
In polygamy, the relationship between one co-wife and another, in respect to their children.
In polygamy, a wife of one's father who is not one's mother; that is, co-wife of one's mother.
One's mother.
The Bank of England, sometimes referred to as the “Old Lady of Threadneedle Street” or simply “The Old Lady”.
A queen.
An elderly woman.
One's girlfriend, wife or significant other.