Yoga means to join or deep thought.The state in which you become one with the object of meditation signifies the real yoga. These days people associate yoga with the techniques which involve standing upside down and sweeping actions of arms and feet. This is yogasan and not yoga. These are methods of preparing the body for yoga. The asanas are required to make the body flexible and strong. Yogasana is the first step towards yoga. After the asanas comes pranayama, then pratayahara and then only comes dharana and dhyan. Yoga is realized when you begin to acquire the quality and nature of the object and begin to experience oneness with all.