When we are young and still under the care of our parents we are in the dependence stage. During this stage you depend on your parents for everything. Your shelter, your food, your clothing, your way of life, etc.... At anytime you are still under the care of your parents you are a dependent.
In the independent stage, you are responsible for your well being and provide for yourself. When you provide your shelter, food and clothing and demonstrate the emotional and psychological mindset to sustain your life you are independent.
The interdependent stage you are independent but you know that working with others is a crucial part of your personal and professional life. Your circle around you will either increase your life or decrease your life. Chose your circle wisely. It is said that you become the sum total of the circle you hang with the most.