Food Security emerged as a concept in 70s, in the discussion of international food problems when the world faced a global food crisis. The initial focus was on food supply, availability and price stability of food items at national and international level. Modification of definition of food security was done taking into account a variety of factors. One of them was that the technical success of green revolution did not automatically led to rapid and dramatic reductions in poverty and malnutrition. These problems were recognised as the result of effective demand by the poor.
There were many definitions of food security put forward by various organisations over time. The latest definition was by the state of food insecurity 2001. According to them " Food security is a situation that exists when all people, at all times, have physical, social and economic access to sufficient, safe and nutritious food that meets their dietary needs and food preferences for an active and healthy life."
Food security is a multidimensional phenomenon. National and international efforts are needed to meet and ensure food security, especially in the area of globalisation and liberalisation. Attention has to be given for long term solutions.