The actual state of his mind—his proud resolve to give the lie beforehand to any suspicion that he would play the needy adventurer seeking a rich woman—lay quite out of her imagination, and she had interpreted all his behavior easily enough by her supposition that Mr. Casaubon’s codicil seemed to him, as it did to her, a gross and cruel interdict on any active friendship between them.
There are no more uses of "interdiction" in the book.
Show samples from other sources
A freebie from the road gods, a car like this will make a great undercover vehicle for drug interdiction.
Jon Krakauer -- Into the Wild
What Jem did was something I’d do as a matter of course had I not been under Atticus’s interdict, which I assumed included not fighting horrible old ladies.