The gentleman with the gray whiskers was obviously an inveterate adherent of serfdom and a devoted agriculturist, who had lived all his life in the country.
He was himself conscious that, except that whimsical gentleman married to Kitty Shtcherbatskaya, who had a propos de bottes poured out a stream of irrelevant absurdities with such spiteful fury, every nobleman with whom he had made acquaintance had become his adherent.
But Lidia Ivanovna’s help was none the less real; she gave Alexey Alexandrovitch moral support in the consciousness of her love and respect for him, and still more, as it was soothing to her to believe, in that she almost turned him to Christianity—that is, from an indifferent and apathetic believer she turned him into an ardent and steadfast adherent of the new interpretation of Christian doctrine, which had been gaining ground of late in Petersburg.
There are no more uses of "adherent" in the book.
Show samples from other sources
Alone, scared, killing before someone can kill him, a firm adherent to the first rule, until he broke it by letting me go and then bringing me back.
Rick Yancey -- The 5th Wave
Initial interest in keeping the yoga class going had surged a bit, but a number of the new adherents (Amy, cursing and squealing with every pose) didn’t last long.