Changeling

Part of speech: noun (n.)

1. One who, or that which, is left or taken in the place of another, as a child exchanged by fairies. Such, men do changelings call, so changed by fairies' theft. Spenser. The changeling [a substituted writing] never known. Shak.

2. A simpleton; an idiot. Macaulay. Changelings and fools of heaven, and thence shut out. Wildly we roam in discontent about. Dryden.

3. One apt to change; a waverer. "Fickle changelings." Shak.

Part of speech: adjective (a.)

1. Taken or left in place of another; changed. "A little changeling boy." Shak.

2. Given to change; inconstant. [Obs.] Some are so studiously changeling. Boyle.