an internal or external framework of bone, cartilage, or other rigid material supporting or containing the body of an animal or plant

the human skeleton

the supporting framework, basic structure, or essential part of something

the concrete skeleton of an unfinished building

the skeleton of a report

a small toboggan for one person, ridden head first while lying in a prone position

the skeleton's runners make a terrifying rumbling sound as they slide down the ice

she can hit 70+ mph on her skeleton sled