An uncut key.

The uncut keys that are kept instock before they are cut into a working key.

A partly made key, which has been shaped to enter the keyhole of a certain type of lock or latch, but of which the blade has not been fully shaped to operate the mechanism of the lock.

(n.) Any material manufactured to the proper size and configuration which allows its entry into the keyway of a specific locking device. A key blank has not yet been combinated or cut. Source: Lock Industry Standards and Training (LIST) Council

A key blank is a key that has not been cut to a specific bitting. The blank has specific profiling/warding to match the keyway in a cylinder. Key blanks can be stamped with a manufacturer or end-user logo or with phrases such as 'Do Not Duplicate'.