If you have dreamed that your dead mother gave a key in your dream: you may be busy with financial matters of your spouse or loved one, and you may find good opportunities to learn new things and improve yourself. To see that your dead mother gives a key in your dream indicates that you will lead a comfortable life thanks to the support of your family, you will not have financial and moral problems, you will have good developments in your life, and you will have a peaceful and full life.