(1):

(n.) The more or less firm or hardened framework of an invertebrate animal.

(2):

(n.) The framework of anything; the principal parts that support the rest, but without the appendages.

(3):

(n.) The bony and cartilaginous framework which supports the soft parts of a vertebrate animal.

(4):

(n.) The heads and outline of a literary production, especially of a sermon.

(5):

(a.) Consisting of, or resembling, a skeleton; consisting merely of the framework or outlines; having only certain leading features of anything; as, a skeleton sermon; a skeleton crystal.

(6):

(n.) A very thin or lean person.