scratch 1. [from `scratchpad'] adj. Describes a data
structure or recording medium attached to a machine for testing or
temporary-use purposes; one that can be {scribble}d on without
loss. Usually in the combining forms `scratch memory',
`scratch register', `scratch disk', `scratch tape',
`scratch volume'. See also {scratch monkey}. 2. [primarily
IBM] vt. To delete (as in a file).