1.to lean forward and downward, or to move the top part of your body forward and downward; if you bend your head or if it bends, you move it forward and downward without moving your body downward
2.to become curved or folded and not straight; to move with a curving or folding movement; if a road, river, etc. bends, it changes direction in the shape of a curve; if light bends, it changes direction; if you bend an object, you change it so that it becomes curved or folded and not straight; if you bend your arm, leg, etc., or if it bends, you move it into a position that is not straight