1. Someone who places his or her body in certain positions: When the posturist, Dwight, was accused of misbehavior, he presented a defiant pose with his hands on his hips.
2. Those who have a frame of mind that affects their behavior and overall attitude: In church, the posturists, including Carolyn and Lesley, presented an attitude of prayer and worship.
3. People who assume or who take exaggerated attitudes by placing their bodies in unusual stances: There was a crowd of posturists sitting in the street in front of the bank with their arms folded across their chests and demanding that the wealthy pay more taxes.