The caged bird has no freedom. His feet are tied and wings are clipped. He stalks down the narrow cage and can seldom see through the bars of the cage. In this condition, all his dreams seem to be unachievable in his life. He has probably given up on his dreams of liberty and flying freely in the sky. His dreams are now ‘dead’. That is why the poet says that the bird ‘stands on the grave of dreams / his shadow shouts on a nightmare scream‘.