From Wikipedia, a most reliable source:
Reboot - a discarding of much or even all previous continuity in the series, to start anew. Effectively, all previously known fictive history is declared by the writer(s) to be null and void, or at least irrelevant to the current storyline, and the series starts over.
Remake -Â generally used in reference to a movie which uses an earlier movie as the main source material, rather than in reference to a second, later movie based on the same source.
Reimagining -Â remakes that do not closely follow the original. The term is used by creators in the marketing of films and television shows to inform audiences that the new product is not the same as the old. Reimaginings often contain tongue in cheek references to the original with characters and concepts of the same name, but significantly changed.
Nothing like standing out in the rain talking with a fellow Movie Geek to get your geek-filled blood boiling. Â So it goes with yesterday evening. Â The conversation deviated towards film studios and how ridiculous they have gotten in recent memory. Â One of the major bones of contention the two of us had with the studios, of which there were many, was this idea of studios saying they are “rebooting” a film instead of “remaking” it. Continue reading Discuss: Remake Vs. Reboot Vs. Reimagining