1.
baldness; bald head
the state of having no hair on the head, or a bald spot
2.
bare spot; barren patch
a patch of ground or surface with no vegetation or covering
Can refer to both human baldness and bare patches on landscapes. When used about people, this word is considered direct and can be rude or insulting — handle with care in conversation. The verb form 禿げる means "to go bald" or "to become bare."