Fair Use:The legal doctrine that allows limited use of copyrighted material without requiring permission from the rights holder, such as for purposes of criticism, comment, news reporting, teaching, scholarship, or research.
Derivative Work:A work based upon one or more preexisting works, such as a translation, musical arrangement, dramatization, fictionalization, motion picture version, sound recording, art reproduction, abridgment, condensation, or any other form in which a work may be recast, transformed, or adapted.
Parody:A work that comments on, criticizes, or pokes fun at an original work, its style, or its subject matter.