Instead of talking of Edward, they came gradually to talk only of Robert,—a subject on which he had always more to say than on any other, and in which she soon betrayed an interest even equal to his own; and in short, it became speedily evident to both, that he had entirely supplanted his brother.
There are no more uses of "supplant" in the book.
Show samples from other sources
Death supplants everything.
Sabaa Tahir -- An Ember in the Ashes
That is the single idea in my mind, the one that has supplanted the possibility of all other rational thought.