Definition of sequels:
(n) :
(narratology) A narrative that is written after another narrative set in the same universe, especially a narrative that is chronologically set after its predecessors, or (perhaps improper usage) any narrative that has a preceding narrative of its own.
(n) :
Any text that continues on from another text.
(n) :
(by restriction) Synonym of postquel; a narrative work that follows-on and is set after an prior existing work.
(n) :
(dated) The events, collectively, which follow a previously mentioned event; the aftermath.
(n) :
(mathematics) The remainder of the text; what follows. Used exclusively in the set phrase "in the sequel".
(n) :
(Scotland, historical) Thirlage.