“To copy, or borrow and alteration of preexisting images to create new artwork.”
With the rise of consumerism and pop art in the mid 20th century, by artists like Robert Rauschenberg, Andy Warhol, and Claes Oldenburg, where they repeated, reproduced, and juxtaposed then remixed existing items that anyone anyone could relate to.
The invention and saturation of the internet in the last 20 years has created the attitude of free for all copy and use of other peoples hard work, this can be a problem as the line between Appropriating or Remixing and a straight out copy of something is fine. Over time you question creativity and the boundaries of what it means to be an artist. Although the need to analyse and gain inspiration from existing artwork is needed to create new work, education is as equally important about the boundaries of what makes good remixing of work vs a straight out copy.