When you are a child, your parents can look like giants to you, so if you dream about a giant you may feel that you are being treated like a child, or you may be feeling helpless.
If you are going through a difficult time in your life, a giant can represent someone who comforts you and protects you.
A giant in a dream can represent an uncontrollable force.
Killing a giant in a dream can symbolize a desire to gain more self-control.
A giant in a dream can represent an emotion that threatens to overwhelm you. If you are repressing strong emotions in real life, a giant whom you are unable to control may appear in your dream.
If you dream that you become a giant, you could be growing intellectually, emotionally or spiritually.
Dreaming that you are a giant can mean that you are seeing things from a new perspective or that you need to rise above petty beliefs.