Derivative-work meaning

In copyright, a work that is based on another, in whole or part, in the same or another medium, such as a sequel to a novel or a live musical based on a movie. A derivative work cannot be published without the permission of the creator of the original, or the permission of any successor to the creator’s rights.
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(law) In copyright law, a work that is a variation of an original work sufficiently similar to contain protected elements of the original work, but sufficiently different to qualify for copyright protection independent of the original work.
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