1. A headache that hurts your whole head: Sue lay in a darkened room, complaining that she had a galea and that the pain in her head was excruciating.
2. A kind of bandage for the head: The emergency paramedics crafted a galea for the patient's head until she could be transported to the hospital.
3. In anatomy, any of several helmet-shaped structures: The professor's instruction in his anatomy class was for the students to identify at least three galeae from the specimens in the laboratory.