It seems like wilt refers to plants and die refers to animals and human beings.Can anyone help me clarify the difference?
A plant wilts when its stems and leaves become floppy from lack of water. If it is watered, it will probably revive. It is dead when it is shrivelled and brown. (Of course, some plants die back naturally and new leaves grow from the root the next year.)
A person can be metaphorically described as wilting if they are too tired or unhappy to hold their head up straight.