http://www.alexandertechnique.com/at.htm
WHAT IS THE ALEXANDER TECHNIQUE?
WHAT ARE THE BENEFITS OF LESSONS OR CLASSES?
"The Alexander technique is a way of learning how you can get rid of harmful tension in your body."* Although certainly not a full definition of the Alexander Technique, this is a good start.
A more complete description is offered in "Changing The Way You Work: The Alexander Technique":
"The Alexander Technique is a method that works to change (movement) habits in our everyday activities. It is a simple and practical method for improving ease and freedom of movement, balance, support and coordination. The technique teaches the use of the appropriate amount of effort for a particular activity, giving you more energy for all your activities. It is not a series of treatments or exercises, but rather a reeducation of the mind and body. The Alexander Technique is a method which helps a person discover a new balance in the body by releasing unnecessary tension. It can be applied to sitting, lying down, standing, walking, lifting, and other daily activities..."
"The Alexander Technique is an intelligent way to solve body problems." So begins an excellent article-length introduction to the Technique.