Dorian explains his view of the difference between "ordinary women" and actresses: "They are limited to their century. No glamour ever transfigures them. One knows their minds as easily as one knows their bonnets. One can always find them. There is no mystery in one of them. They ride in the Park in the morning, and chatter at tea–parties in the afternoon. They have their stereotyped smile, and their fashionable manner. They are quite obvious. But an actress! How different an actress is!"
What does "stereotyped" mean?