Also found in: Dictionary, Thesaurus, Medical, Legal, Wikipedia.
A condition in which a person suffers from nausea and vomiting. Motion sickness includes sea sickness, car sickness, swing sickness, and air sickness. The sickness in the air may be caused by a fear of flying, apprehension at seeing the horizon at different angles, turbulence, unusual attitudes, and g forces. It also may be caused by mismatching between the balance signals from the ear and the visual signals from the eye. Also called air sickness.