1. The absence of orientation movements in response to gravity: When participating in a space flight simulator, the astronaut experienced ageotropism and so he had no sense of responding to gravity.
2. Turning away from the earth: Elena was studying plant ageotropism and so she was growing plants in a gravity free environment.
3. A reference to parts of plants that would be expected to grow as gravity pulls them down, but instead grow upward; such as, the knee roots of cypress trees: Marcella tripped over the ageotropisms of the tree in the swamp because the roots were sticking up out of the earth.