They are also used to immobilize the ankle and lower leg in the presence of arthritis or fracture, and to correct foot drop; an AFO is also known as a foot-drop brace. Ankle-foot orthoses are the most commonly used orthoses, making up about 26% of all orthoses provided in the United States.
adjective. noun. Fundamental is defined as something that is basic or essential. The most basic underlying truth of a religion is an example of a fundamental truth. The definition of fundamental is a basic truth or law. Freedom is an example of a fundamental of the American ideal.
noun. 1  1A fundamental truth or proposition that serves as the foundation for a system of belief or behaviour or for a chain of reasoning. 2  2A general scientific theorem or law that has numerous special applications across a wide field. 3  3A fundamental source or basis of something.