Harry Wotton envies Dorian's experience, saying that no woman has ever killed herself for love of him, as Sibyl seems to have done for Dorian. Instead, his lovers "have always insisted on living on, long after I had ceased to care for them, or they to care for me . . . they go in at once for reminiscences. That awful memory of woman! What a fearful thing it is! And what an utter intellectual stagnation it reveals!"
What does "stagnation" mean?