I thought Mr. Jaggers glanced at Joe, as if he considered him a fool for his disinterestedness.
But he really is disinterested, and above small jealousy and spite, I have heard?
To the present moment, I believe it to have been referable to some pure fire of generosity and disinterestedness in my love for her, that I could not endure the thought of her stooping to that hound.
What follows has another (and I hope more disinterested) purpose.
There are no more uses of "disinterested" in the book.
Show samples from other sources
All the Finches had straight incisive eyebrows and heavy-lidded eyes; when they looked slant-wise, up, or straight ahead, a disinterested observer would catch a glimpse of what May-comb called Family Resemblance.
Harper Lee -- Go Set a Watchman
He looks up at them, disinterested and maybe disgusted by the baby, because he wanders deeper into the recesses of the cluttered store to get away.